web components need 2 things to be great without external libraries (like lit-html):

- signals, which is currently Stage 1 https://github.com/tc39/proposal-signals

- And this proposal: https://github.com/WICG/webcomponents/issues/1069 which is basically lit-html in the browser

It's a shame Surplus (Adam Haile's, not my succession of it) isn't cited nor is he mentioned, given that at least two of the listed frameworks were heavily and directly inspired by his work. S.js is probably one of the most incredible JavaScript libraries I've used that should be the reference for a signal API, in my opinion.