Absolutely.
My only note it is that isn’t 40 years. For SV it’s more like 60 years (going back to the founding of Fairchild) or even longer if you want to go back as far as HP and other radio shops.
For NYC, it’s even longer. IBM has had a major NYC presence since at least the 30s (and obviously its main HQ is less than 40 miles from midtown)! Bell Labs/AT&T was based in Manhattan before moving to New Jersey and obviously is still in the NYC are. And that goes back to the 20s I think.
Not to mention other NYC and NYC adjacent companies like GE. So we’re going back 100 years or more for NYC and 80 for SV.
Xerox’s history combines both areas.
And as you said, Texas has a strong history too with the Motorola stuff and Silicon Prairie.
Historically speaking, Seattle is a relatively new entrant in computing and innovation, only really being a hub for 40 years or so (unless you count Boeing and then it back over 100 years), but is the home of two of the biggest companies of the last 50 years, Microsoft and Amazon.
Dozens and dozens of cities all over the world have tried to be the Silicon Valley of X and none have succeeded. And New York is extremely unique as a global center in dozens of different industries from finance to media to fashion to the arts.
Obviously things could be disrupted. But both of these areas have been innovation hubs for over 100 years, which given the short history of this country, is remarkable.