To be fair, one of the big perks of Tailwind (IMO) is not having to have a big ol' folder of CSS that you have to figure out what applies where in HTML, but rather just having all your styling inline (while still staying consistent, which is the usual downside of inlining styles manually). Having to have a tailwind-addons.css when you needed random bits of CSS they didn't have classes for kind of sucked; this looks like a nice QOL that would get me back to the original goal of uniting structure-and-style into singular files.

FWIW, I also hated using header files in C++ and also wrote a Ruby library for inlining all my tests immediately following the functions they test. I like having more context when looking at code without having to flip around from file to file to piece a bigger picture together.