100% agree about Boston - it's basically an East Coast version of the Bay Area, but software is very clearly overshadowed by Biotech/Pharma and the tech industry leans cybersecurity+defense (not a problem for me personally, but a harder industry for your stereotypical HN commentator to break into tbh).
And I agree that Denver and SLC are both similar as well, but they don't have as deep and diverse a white collar environment yet. As a Bay Area native, only other metropolitan I've seriously considered living long term are Boston, DC, Seattle, and San Diego. But not all of them are one-to-one similar to the Bay.