it's all in an experimental stage ... and has been for years. The only reason all browsers now push it, is so they can, maybe, be at the top of the ladder.
Just read all the negative reviews. It's not ready for prime time. And that's for all the browsers.
Personally, I avoid it - serves no purpose for us. And if you're asking, probably serves no purpose for you 👍
(sidenote: software engineer here for 30+ years, so have some insight)