I man don't get me wrong, I love the idea of PWAs but this dude is out to lunch. It's so painful making anything complex work cross browser/cross platform. On iOS iirc they don't even support adding PWAs to the homescreen? You definitely can't Bluetooth outside of Chrome (probably only on Android and Windows too because nothing fun is ever allowed on Macs).
Multiplayer games you kind of need UDP. You cannot UDP in the browser (WebRTC data channels technically use UDP but that stack is an abomination wrapped in SCTP and DTLS)
This is by no means an exhaustive list, just issues I've dealt with recently. It's better than it was with WebGPU and WASM, some of the gap between a native app and a website is surmountable, but unless you're doing something extremely boring surmounting the gap is hard fucking work.
Multiplayer games you kind of need UDP. You cannot UDP in the browser (WebRTC data channels technically use UDP but that stack is an abomination wrapped in SCTP and DTLS)
This is by no means an exhaustive list, just issues I've dealt with recently. It's better than it was with WebGPU and WASM, some of the gap between a native app and a website is surmountable, but unless you're doing something extremely boring surmounting the gap is hard fucking work.