The late 90s early 2000s were a dark period, software-wise. Nothing compares to that, thankfully. People either forget, weren't there or were just oblivious Windows users.
Chrome starts a proposal, implements it and “intends to ship” it before anyone really has time to discuss it. Recently (2 months ago?) they introduced a new WebExtension API that nobody cared about nor really understood the need for, but it’s still there, making it look like it’s a “standard”
Even today, this doesn't mean much if Apple decides to ignore web standards that are harmful to their business model. Web Notifications were implemented by Safari Desktop, Chrome Desktop and Firefox Desktop[0] in 2012 - and Safari Mobile in 2023. That's 9 years that a pretty useful and important API couldn't be relied on by PWAs. And this is just one of many examples.
This has a real effect on what technologies developers can actually use, which is fairly similar to the effect IE6 had on newer APIs during its time.
[0]: Chrome & Firefox desktop because I can't find a way to see historical dates for mobile on caniuse - but it was around that time, or a bit later, for mobile as well