We know that until Jesus came on earth and was crucified the saints of the OT did not go to heaven until afterwards, when He died they went to be with Him. And we also see in v26 that there was a great gulf fixed so that those who want to pass from here to you cannot, nor can those from there pass to us. So that nullifies an exchange from one place to the other for the OT people. Now the saved, their spirits go to be in heaven and the others to death and hades is all the scriptures tell us. Rev 20:12-15 And I saw the dead, small and great, standing before God, and books were opened. And another book was opened, which is the Book of Life. And the dead were judged according to their works, by the things which were written in the books. 13 The sea gave up the dead who were in it, and Death and Hades delivered up the dead who were in them. And they were judged, each one according to his works. 14 Then Death and Hades were cast into the lake of fire. This is the second death. 15 And anyone not found written in the Book of Life was cast into the lake of fire.
Luke 16:22-31 So it was that the beggar died, and was carried by the angels to Abraham’s bosom. The rich man also died and was buried. 23 And being in torments in Hades, he lifted up his eyes and saw Abraham afar off, and Lazarus in his bosom. 24 “Then he cried and said, ‘Father Abraham, have mercy on me, and send Lazarus that he may dip the tip of his finger in water and cool my tongue; for I am tormented in this flame.’ 25 But Abraham said, ‘Son, remember that in your lifetime you received your good things, and likewise Lazarus evil things; but now he is comforted and you are tormented. 26 And besides all this, between us and you there is a great gulf fixed, so that those who want to pass from here to you cannot, nor can those from there pass to us.’ 27 “Then he said, ‘I beg you therefore, father, that you would send him to my father’s house, 28 for I have five brothers, that he may testify to them, lest they also come to this place of torment.’ 29 Abraham said to him, ‘They have Moses and the prophets; let them hear them.’ 30 And he said, ‘No, father Abraham; but if one goes to them from the dead, they will repent.’ 31 But he said to him, ‘If they do not hear Moses and the prophets, neither will they be persuaded though one rise from the dead.’”
Nothing there denies the possibility of repentance & salvation to any who might end up in the lake of fire. In Rev.20:11-15 those in Hades get out of Hades, so Hades (Lk.16:19-31) is not a place of unending torments.
Even of the rich man in Hades (Lk.16:19-31) it is not stated how long his torments would last while there. Or denied that they could end while still there. Nor is it denied he could be saved while still in Hades. The rich man's Saviour is in Hades:
"If I ascend up into heaven, Thou art there; If I make my bed in the nether-world (Sheol = Hades), behold, Thou art there." (Psalm 139:8)
The rich man is called "son" (literally, "child") :
Lk.16:25 “But Abraham replied, ‘Son, remember that in your lifetime you received your good things
"Here, too, was one who, even in Hades, was recognised as being, now more truly than he had been in his life, a “child” or “son of Abraham.” (Comp. Luke 19:9.) The word used is the same, in its tone of pity and tenderness, as that which the father used to the elder son in the parable of the Prodigal Son (Luke 15:31), which our Lord addressed to the man sick of the palsy (Matthew 9:2), or to His own disciples (John 13:33)." Ellicott's Commentary for English Readers
The rich man in Hades is receiving the Word of Truth from Abraham. If not to lead those there to repentance & salvation, why would anyone in Hades be receiving such truths.
When it is implied that the rich man is where he is due to his lack of compassion for his fellow man, in particular Lazarus, he responds positively by turning his attention from himself to his brethren still alive & requests that they be warned about Hades. Is the rich man turning from his selfishness & showing concern for others?
The story speaks of a great gulf fixed stopping the transfer of persons from one place to the other place. It does not say this gulf will remain in place forever. Only that at that moment in time it was so. Possibly the chasm barrier refers to the unrepentant state of those in Hades, & that once they repent the barrier stopping any individual from leaving is removed. Nor does the passage deny the possibility of salvation to the rich man in Hades while he remains there.
" “And besides all this, between us and you a great chasm has been fixed, so that those who want to go from here to you cannot, nor can anyone cross over from there to us.” "
" "So even if we made the mistake of trying to extract from the details of this parable a position on the issue of whether there will be further chances, there still wouldn’t be much cause for taking this passage as supporting the doctrine of no further chances with any force at all. For as long as the [one] who believes in further chances sensibly allows for the possibility that, while punishment is occurring, those suffering from it can’t just end it any time they want, she can make perfectly good sense of the words this parable puts into the mouth of Father Abraham. After all, if a road has been covered with deep enough snow drifts, we’ll tell someone who must drive on that stretch of road to get to where we are, “You cannot cross over from there to us.” We’ll say this quite properly and truthfully, even if we know full well that the road will be cleared in a few days, or that, in a great enough emergency, a helicopter could be used to get across to us even today, if, say, we’re at a hospital. [But doesn’t that show that there is a sense, then, in which they can cross over to us? Yes, there’s a perfectly good sense in which they can, and a perfectly good sense in which they cannot. For enlightening and accessible explanations of the meaning of “can” and related words, I recommend Angelica Kratzer’s “What ‘Must’ and ‘Can’ Must and Can Mean” (Linguistics and Philosophy 1 (1977): pp. 337-355) and example 6 (“Relative Modality”) of David Lewis’s “Scorekeeping in a Language Game” (Journal of Philosophical Logic 8 (1979): pp. 339-359.]"
The duration, nature, intensity & purpose of the torments the rich man was suffering are not revealed in this story. His torments there could have lasted less than 5 minutes.
Luke 16:19-31 rich man in "hell"