This is great in my opinion. Web browsers are infernally complicated and need to be simplified. CSS is a bloated mess. Javascript is a bloated mess. I would love to see large swathes of both of them eliminated from existence, and maybe the maintenance burden leaves a very small chance that we could start to see some of these technologies starting to get dropped. I personally would love to see web components disappear most of all.
Regardless, Google really fucked over the web when they decided to add all these unnecessary technologies to Chrome. No doubt a EEE strategy to take over all browser development on the web. Something should have been done much earlier about it, but now we'll have to see how this mess gets sorted out.