Earlier quoted context omitted.
There's a lot to like about many areas of California. Which ones may depend on your weather, cultural, etc. preferences. But Silicon Valley proper I find not particularly appealing; housing costs are only part of the reason. (SF itself has well-documented pluses and minuses.) I don't live or work in CA/SV. But if I were in SV but no longer needed to commute, I might well stay in CA but I'd probably move somewhere out…
I think SVs appeal is that you can leave in a quiet suburb close to a lot of easily accessible nature, while still having Amazon 2-day shipping, ridesharing, Uber Eats, and luxury retail. There's not many places in the US like this. Europe has a lot but there's not much tech jobs in them. You are also close to SF if you like the madness of the city every once in a while. Other suburby places with nature easily access…
Maybe I'm missing, but I don't see anything in that list that isn't true of almost every metro area in the US. I think people living in SF notice when new services come out that are only available there, like Uber was at first. But they don't notice when those services later spread to the rest of the country. You can get Amazon Prime shipping and rideshares everywhere now. Other cities may have somewhat less luxury retail, but likely have shorter drives with less traffic to get to nature.