> First of all, features can be a standard without (full) FF and/or Safari support.
No. No they can't. A feature that is shipped in a single browser is just that: that browser's non-interoperable feature.
We literally lived through this with Internet Explorer.
The only reason the web is thriving now is because browser vendors agreed not to push this shit any longer. Well, until Google decided that whatever it does is the web, and until people who are not even paid by Google started unironically pushing the idea of "whatever Google spits out is the essential web standard now".
I mean, the status of multiple APIs on any of those "Safari is bad PWA is good" sites are literally in the "it's a napkin scribble, not on any standards track".
> They're holding the standards hostage by not allowing the market to decide which features are important to them (and put pressure on Safari and FF to implement them)
Who puts the pressure on FF to not implement Chrome-only non-standard APIs? Even desktop Firefox doesn't want to touch that pile of garbage with a 10-yard stick. And yeah, let's not pretend that Chrome somehow got to where it is by "market deciding".