Austin has the whole "supply chain" of startups - from accelerators to large & mid-size technology companies. The network is close-knit but easy to access and people are very friendly here. Combine all of the aforementioned with the cost of living (albeit, it's increasing) and you have a great city to live in.
Highly recommend.
If you end up coming out here, please let me know and I'll buy you a coffee and am happy to introduce you to others/local events.
I think you will be fine if you go in with the right expectations. It’s no Silicon Valley. so if you are expecting that kind of diversity and density startups you prolly will fall short of your expectations. Also, Having said that at the end of the day you need one company to work at a time. Also with COVID and wfh on the rise you might find a broader range of startups eventually but you shouldn’t move based on that. If you think In terms of skills development I think there are more than enough startups to cover your basis.
The culture, size, and types of companies are different, as you'd expect when comparing completely different cities, but you certainly wouldn't feel like there's nothing going on. In fact, I think you'll be very pleasantly surprised coming from Davis.
It's definitely not like the Bay Area, but I'm not sure anywhere else (in the US) is yet.
Also checkout https://www.builtinaustin.com
Email or tweet me and I can point you in the right direction. I’m part of a Clojure meetup here that has some startup people that come often.