Right, I wanted you to spell it out because I was expecting you to write that exact sort of nonsense. Your first three examples aren't even web standards they're experimental features in Chrome that not even Firefox supports. The fourth actually is supported by Safari/iOS. What missing standards are stopping you from writing Progressive WEB Apps? Be exact please.
And.... even if you wanted to build a serial-port enabled "Works only in Chrome" PWA today (lol, we both know you're not) there's no tooling jankiness stopping you from doing so, checking for `if ("serial" in navigator) { ... }` requires no tooling at all it's just plain javascript, you'd just choose to show an error message for browsers like Safari and Firefox that don't support it.
I'm not convinced you're even arguing in good faith here. Well, I never was because PWA whiners never are, but you've proven you're not.