M
at 16:28
Verily I say unto you, There be some standing here, which shall not taste of death, till they see the Son of man coming in his kingdom.
Luk 9:27
But I tell you of a truth, there be some standing here, which shall not taste of death, till they see the kingdom of God.
Even can be found in Mark 9:1. It comes right before Peter, James, and John see Jesus in full glory. The same glory as the full image of God, those who are in Christ will be restored to at the Second Coming. Those 3 saw a glimpse of the Second Coming body. John does not give an account of the Transfiguration. It is in John 21 were Peter ask Jesus if John is the one who will not die until the Second Coming.
Here is a twist. I think James and John were pre-teen when they became disciples. They were orphans and Jesus sort of adopted them into the group. Jesus and John had a father/son relationship. To make literal sense it was the teen crowd who listened to Jesus who would still be alive some 40 years later. James was martyred though. The only other explanation outside of the Bible would be that John did die in the vat of burning oil, but came out in an incorruptible resurrection body the same age, and he never aged again. That is why he was placed on Patmos, because the Emperor feared John after that. There are many accounts up to John dying, but I doubt he died, but was taken to heaven like Elijah. One account indicates John left for about 20 years and came back to a certain city and all had aged, but it seemed John had not. John as one of the 2 witnesses, will be allowed to die by the hand of Satan.
That is a different and unique death as well. It never claims the soul leaves and comes back. It says the breath of God enters the body and brings it back to life. No other Christians around to pray over them. God sends the Holy Spirit. Not even a new body, but the same body brought back to life. No change like Paul claims for those in dead corruptible flesh.
Other than the account of Stephen being stoned to death, the physical death is not portrayed much for those in the NT. I do not think all are martyred which would be physically painful, even though the Bible portrays NT death as being martyrs. Being martyred one physically tastes the sting of death, at least the physical pain and suffering. Those who die peacefully should not taste death at all. The soul leaves one body and is instantly in a new permanent incorruptible body. That is another way that many would see the Second Coming from Paradise without tasting death. Tasting death does not necessarily mean physically dying in the strict literal sense of dying. Physically dying was portrayed as going to sleep. Ironically passing in one's sleep is not tasting death. "Sleeping" in Abraham's bosom was also a thing of the past after the Cross. John the Baptist and Lazarus being the last two examples to go there and taste death in Abraham's bosom.
Many would not go to Abraham's bosom, who were standing there that day. They would not experience death the same way after the Cross as those before the Cross.