CS
Tradition isn't the making of songs and then their re-emergence a century or so later - I don't think it works like that.
The tradition, for me, is not simply repetition, but implies a continuum; constant transmission and adaptation so that the songs continue to exist in mulitiple forms (version). This, for all sorts of reasons, no longer appears to happen. Four hundred something years ago Henry VIII was said to have composed songs; 'Greensleeves', 'The Hunt Is Up'.....
While they were certainly performed down the ages; as far as we know, they have remained as written and dis not undergo the traditional process.
If today's (or yesterday's, or the day's before) pop songs were going to become 'traditional', surely there would be some signs of the process taking place.
Sure; pop songs are parodied by children or for political or sporting purposes.... etc, but I think that's something else.
Jim Carroll