I'm saying we weren't taught when react was the way people wrote sites. if I was writing a site with pure html, css is great, especially modern css.
but if I'm already using react and their abstractions, opinions on that part aside, I'd personally rather lean on the react component as the unit of reuse. tailwind removes the abstraction that you don't need, since many people in react tend towards one scoped css file per component with classes for each element anyway
at this point I'd be more inclined to say for many sites the api and data fetching things are the content and html+css is presentation. csszengarden is cool but I haven't seen the html/css split help an end user, or really even me as a developer.
I feel like it's probably not a high priority, but the company I worked at that selfhosted gitlab was also paranoid about dependencies disappearing and so mirrored every repo they had a dep on.
I imagine that's not that rare of a situation and it would have been a nice qol kinda thing if we could have federated with the upstream and gotten a backup of issues and such and could do everything on the one platform. definitely not important and requires upstream to also federate, which will never happen for github so not important