I'm well aware of details (I use it in GitHub READMEs frequently), but you still can't animate it like I described – without that, no designer is ever going to want you to actually use it. Builtin elements are worth fuck all if they don't meet your requirements!

You a moment ago:

> half the stuff things like React are used to do could be accomplished much better with a small amount of CSS

you now:

> yeah, you can't do it in pure CSS because you can't do most things in pure CSS