How are you possibly writing any kind of real-time app in JavaScript with a GC?

Real-time and general purpose GCs does not sound like a good idea, except for very specialized GCs...

Talking about soft real-time here… do you think multimedia apps should be native-only? That it’s a bad idea to put multimedia apps on the web?

The web does not imply a GC.

Most multimedia in the web is hardware accelerated, SIMD accelerated via plugins or uses Wasm.

Any other way would be a huge waste on resources or simply impossible to do for high resolutions.

> That it’s a bad idea to put multimedia apps on the web?

Yes? Obviously? The only reason Flash ever worked for anything useful (-ish depending on your opinion of video games) was that it was in practice isolated from the rest of the web browser. Javascript... isn't.

Nor real-time and Javascript in a web app

You might be forgetting that multimedia apps are often soft real-time.