all of them were written in a way that mostly affect the api, not the underlying implementation models tho.
it's still 500 new things to test and actually implement. but not as bad as the original 1 to 2 change.
html5 was the forever missed opportunity to do things right. but keeping the browser-side effort low was always fought for on the w3 committe.
468 new features have been added since 2018; 148 have been added in the past 18 months alone [1].
I applaud the effort but unless something fundamentally changes in their approach, I don't see how they can catch up.
Sure, you don't need every single spec, but even the core ones like Flexbox, Grid are large and complicated and are constantly being tweaked.
[1]: https://codepen.io/fimion/pen/WNmwJWJ