To all:
please remember the true purpose was a sign to unbelieving Jews that God's mission really was the message of Christ and to go the nations. That's why there are unbelieving Jews observing this happen and seeing the impact on Gentiles.
Whatever was going on at Corinth is a subjective abberation of this, and even then, Paul still tells them and quotes to them why it was happening.
The reason it would end would be that there were fewer and fewer unbelieving Jews who would need to shown that.
You need to read what Paul taught...not what others have taught you. Tongues when coupled with interpretation is to profit withal, for edifying the assembly, as with word of wisdom and knowledge or revelation or prophecy.
Moreover Paul specifically told us when the gifts would cease in the church.
"for our knowledge is imperfect and our prophecy is imperfect, but when the perfect is come the imperfect will pass away"
Nothing to do with the Jews.
"For now we see in a glass but darkly but then face to face, now I know in part then I shall understand fully even as I have been fully understood."
Some would have us believe that Paul was speaking about the bible....but Paul had the bible, he was the writer of a goodly piece of it.
You cain't tell me that the revelation that Paul had in his soul became more perfect when it was written down than when he was teaching and preaching it live in the very presence of God. That is daft.
As far as scripture knowledge and revelation was concerned Paul had it.
But yet he said "now we know in part, now we see partially, when the perfect is come we shall know fully, we will see face to face"
The perfect which still IS yet to come is not the scripture but what the scripture prophesys....the kingdom when we shall see the Lord face to face. Then we will all know and be known.