[manmal]

> you in fact destroy composability in favor of either inheritance

I favour composition over inheritance, so I'm ok with that.

> Your components don't minimize outside dependencies when they share the same global stylesheet, by the way, they would for example not work in my website even though I am using Tailwind (if highly customized).

I think you just made the case for using vanilla Tailwind and restraining from customizations to cater to design extravaganza. The days of pixel perfectness are over, and designers can and should IMO get used to making compromises. Form follows function, and using vanilla TW can get you more "form" in the same amount of dev time.

Having said that, wouldn't you just have to merge the two Tailwind configs and generate a new CSS file? Apart from color naming clashes (which can't be avoided in any system) I don't see any issues there.