I still maintain there's age-cohort bias (anti boomer, etc.), not strictly age bias. In 2000, I remember most people over 30 being clueless about the Internet (given that the population who were familiar with the Internet in the 80swas so small...that core group was of course super clueful, but was of measure zero vs. people who were learning about it in college every year.) Now, it's largely been the case that anyon…
we are in a new era, one in which someone's age doesn't really tell you anything about their tech relevance. we generally hire based on experience only, not specific technologies or schools, so we end up with employees all over the map.