Ageism is huge in tech.
What sucks is that most of these whippersnappers can't code their way out of box. They write some bullshit java app that leaks memory, counting on GC, and I could write the same thing in C in half the time, no leaks, and at least 10% faster. But do I even get the opportunity?
Or the sysadmin side... I've built some significant stuff in my career, but management always listens to the young guy- even though I have data and thorough analysis to support my arguments, while the youngsters only have buzzwords and double-speak.
It is maddening.