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Why are there so many graybeards in FOSS?
(www.theregister.com)
This is a most excellent place for technology news and articles.
It's not youth bad. It's that in the 80s and 90s, computers were fun and required a lot of tinkering. Nowadays they mostly work. They're boring.
People who tinkered learned stuff. Users just know how to use a couple applications.