And so have Eindhoven (ASML), London (Revolut, Monzo, Wise and Deliveroo), Paris (DailyMotion, AppGratis), Berlin (Soundcloud, Mister Spex, Zalando, Helpling, Delivery Hero, Home24 and HelloFresh) and Amsterdam (Sonos (ok, technically Hilversum), Booking.com, TomTom) etc, etc. So what?
Tech companies exist the world over. The specific kind of tech company that requires a mountain of free cash and that can monopolize a whole segment is a SV anomaly and Microsoft is the exception simply because of when it started.