I’ve been blocking Google domains completely (except for OCSP) for almost a year (using DNS). I’m sure some domains use Google Cloud and slip past the DNS blocks, but usually the only things that break are captchas and some shitty old websites that pull jQuery from a Google domain (why would anyone do that?).
“It breaks all of the internet” is a little dramatic, maybe if you block their OCSP domains that’s true.
I do agree though that 80% is low, even if only counting the traditional tracking script that’s been used everywhere for ages.
Oh yeah I always forget people still cry about that. I’m a big fan of the unified experience that the software and hardware bring together, and that experience hasn’t been poor for me.