I've lived in Austin for about a quarter century. All of my extended family are from upstate NY (parents/grandparents from there originally).
Totally agree with what you've said about upstate NY - it's pretty depressing to visit these days. Taxes and regulations aren't the only aspect, but they're a huuuge part of it. Have seen some valiant efforts to turn things around (e.g. SUNY), will have to see how that works out.
With regard to Austin and TX, will be interesting to see how that plays out. Austin has always been more liberal ("The People's Republic of Austin" was a nickname), but now essentially all the major cities in TX (not to mention everywhere else) are liberal. TX State Leg and Austin used to fight a lot, but things have gotten decidedly worse recently with the state trying to neuter all local control (and even doing some particularly gross things like passing voting legislation that only applies to Houston). See https://www.texasobserver.org/death-star-hb-2127-democracy/
I used to love Austin, but not so much anymore, and it's not just a "back in my day" story. When I first moved here, I thought "yeah, it's smack in the middle of Texas, and it doesn't have anywhere near the amenities (arts, sports, architecture, transit connections, etc.) of a larger coastal city. But it's so much cheaper than those cities, so you can actually afford to take a lot more advantage of the things it has. And from a weather perspective, sure you've got 2 months of super hot summer, but then you get 10 months of great weather."
Those tradeoffs have started to go rotten. Austin is now expensive as fuck (with the traffic to match) but it still lacks the amenities of a larger city. The state government has really started negatively affecting the day-to-day lives of citizens. And from a weather perspective, this is not just a hellish summer - we've never had anything like this continuous onslaught of 105+ days, and it's only going to get worse.