Comment by ffsm8
I believe the argument was that jsx doesn't support that either, which should be correct as far as I know.
They're all features in the jsx ecosystem that are provided by other libs, which are often preconfigured with projects utilizing jsx.
I did miss a lot of the tooling I've gotten used to the last time I made a weekend project utilizing lit webcomponents for sure, but I believe the people advocating for it usually rejoice in having less tooling in their development pipeline - it's just a fundamental disconnect between people that have learned and gotten used to current frontend development and people that don't really want to bother with it, looking for simpler solutions with less moving parts.