Getting older is indeed a factor and I am surprised tha author didn't reflect on that himself.
While it might be the case, there's definitely something else going on which I would describe as tech "globalisation" or "unification". The industry that looked like an archipelago of islands with their own ecosystems, philosophies and values increasingly looks like monoculture fields replicated zillion times (yc-style startups and "big tech co" being the two most popular breeds). Of course, the reality is more subtle than this - but the alternative voices and perspectives are completely overpowered by the mainstream narratives - to the point of being barely detectable.
While it might be the case, there's definitely something else going on which I would describe as tech "globalisation" or "unification". The industry that looked like an archipelago of islands with their own ecosystems, philosophies and values increasingly looks like monoculture fields replicated zillion times (yc-style startups and "big tech co" being the two most popular breeds). Of course, the reality is more subtle than this - but the alternative voices and perspectives are completely overpowered by the mainstream narratives - to the point of being barely detectable.