Earlier quoted context omitted.
The analogy is simple: back in the day devs got sick of IE because it was the one thing holding them back. You can make a site, easily, that looked beautiful on all the other major browsers, but because IE was outdated when it came to standards support, you had to basically spent all your time fighting with it. Safari serves that role today. There are tons of things I'd love to do but can't because they're not suppor…
Safari is not holding back, Safari is just not implementing Google’s PWA (because it doesn’t really make sense on Apple devices where it would be far inferior to native). You can make a beautiful site in Safari and it will work everywhere (I do professionally). Chrome is the new IE (2001 era, when it was cutting edge and pushing proprietary technology) except ActiveX is PWA.
PWAs are here to stay.