Had a brief look a few months ago - doesn’t look possible (certainly not easy) on a permanent basis as far as I could see. You can get a 6 month visitor’s visa (B2 ?) but probably need to maintain a UK home to be accepted even for that. Surprising really, would have thought they’d encourage...
Don’t particularly like NYC myself (maybe because been there probably 30-40 times and got a bit bored although as anywhere does have it’s good points), and SF was way below expectations for me (but loved Alcatraz and Sausalito). Went to Vegas for the first time last year and actually loved...