One benefit of tongues, which never gets mentioned is its value in spiritual warfare and deliverance.
I started speaking in tongues back in the 70s, and apart from the uses listed above, have used it extensively against the demonic powers and principalities that Paul speaks of in Ephesians 6.
On many occasions when I've been involved in strategic warfare, and don't possess all the facts in my head, I know that my spirit can access those facts. Thus instead of addressing the Lord in tongues, I am led by the spirit to rebuke the enemy in tongues, often very violently and for length of time. According to scripture, such words are weapons of war, just like swords, spears and arrows.
In doing so, I have seen major demonic strongholds come crashing to the ground.