In general;

The young 'uns will go where there are other young 'uns

The older folk will congregate where there are other older folk.

That's how it is because both age groups feel most comfortable that way most of the time.

The generation in between are mostly too busy rearing families - at least I was.

I did say "In general" but as someone said at a session this lunchtime "Generalisations are always wrong" :-)

In the end, what really matters is that the music survives, and I am sure it will, though it will change in the process.