[fsk]

The problem is that there's 100 new things, and it's hard to tell what's going to last and what's just a fad.

Also, once you have a job using X, there isn't much opportunity to get work experience in Y.

I've also have several recruiters say "Learning stuff on your own doesn't count. You need actual work experience in Y for employers to value it." That's hard when you have a job where they only use (somewhat-obsolete) X.