What are some of your preferred UI component libraries? Bootstrap, Material, TailwindUI, Antd etc are pretty popular. Just curious, what else do people use?

The one that takes least amount of time for you to learn and use into your project. 😉 As project size increases, people prefer a more custom look which these libraries wouldn't provide out of the box, so one should look for the one which provides easiest customization/overrides (and can also sustain minor framework updates).

Good points, but specifically, what was one such library that you last used?

I've used Bootstrap and Material, both are decent, Bootstrap is more flexible though and you can spin a custom build with it which would include only the components that one wants.

I’ve used Tailwind UI in the past. It’s paid, but definitely worth it.

TailwindUI 😁

I prefer tailwind and MDBootstrap

I have tried 3 out of 4 you mentioned. But https://chakra-ui.com/ is something I would really want to try in the future.

Chakra UI all the way 💯