I’ve never heard of flashing to pass, the only thing I’ve seen it used for is to let a car in the right lane trying to get into the left lane know it’s safe to do so (as a driver in the left lane). I’ve only ever seen it used by truckers.
As far as Minneapolis goes, I’m quite the opposite. Having lived on the west coast I dread going to Minneapolis — everyone seems to be in a bad mood whenever I go there.
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.