Given how gzip is the single most effective way of reducing BW consumption and site-loading speeds, I think we can conclude that those who don't bother don't re

Given how gzip is the single most effective way of reducing BW consumption and site-loading speeds, I think we can conclude that those who don't bother don't really care about performance either way. And in those cases HTTP 1.x vs HTTP 2.x is a moot discussion anyway.