I really don't like how it handles responsive design, but that could also be because I work more on apps than marketing sites. First, fixed device breakpoints doesn't seem like the way to go, I find I need more customized breakpoints that are based around the UI rather than having general phone/tablet/desktop breaks. Then because you are applying styles to each element for each breakpoint, its very hard to look at and comprehensively think about a single breakpoint's layout. I can see where this works for making minor changes here and there, but major layout changes with breaks are almost impossible to keep in your head.
Then with flex box it lacks a great deal of customizability when it comes to controlling how space is distributed across elements.
And somewhat bigger picture, I'm looking to use less tooling and preprocessing, not more. CSS has come a long way to where we can now get rid of SASS, but instead Tailwind is replacing that step with fullying buying into the whole webpacker tool chain. If you're already really into webpacker that's not a huge issue, but brining along node and webpacker just for a CSS library is a bit much.
Then with flex box it lacks a great deal of customizability when it comes to controlling how space is distributed across elements.
And somewhat bigger picture, I'm looking to use less tooling and preprocessing, not more. CSS has come a long way to where we can now get rid of SASS, but instead Tailwind is replacing that step with fullying buying into the whole webpacker tool chain. If you're already really into webpacker that's not a huge issue, but brining along node and webpacker just for a CSS library is a bit much.