Hopefully, the browser Bluetooth API will receive more support (https://developer.mozilla.org/en-US/docs/Web/API/Web_Bluetoo...). Web-based PWAs are more suitable because apps are subject to app store censorship.

Can PWAs run (and interact with Bluetooth) in the background? Edit: no they can't, so PWA would be not very useful at this.

Could still work in some cases where a certain amount of users are in and out of the website and in proximity e.g. protests

Doesn't help if internet is down.

web apps can work offline

The naive idea of wanting to protect artists is actually protecting the monopoly of big companies.

Some projects against this behavior:

https://github.com/syncblob/Obey-AI-Luddites