this is Rust, not some single-dev pet project

The programming language has absolutely nothing to do with the size or maturity of a GUI library using it.

Because it's literally advertising for LLM companies. Because certain news sites conclude from it that "AI did $thing" instead of "engineer did $thing, using whatever tools they found useful". Because you can't actually enforce it, which makes the tag completely useless.

Any of these reasons is good enough on its own.

plasmashell supports gifs and videos, and it runs on the GPU, not the CPU.

Plasma is started in nested mode, so it can't control any physical screens.

If you start a session with the drm backend manually, it might work that way - if you do have those DisplayLink drivers working. The USB port does not support DisplayPort.

They were discussing the global shortcuts portal for about 10 years, with different portals and revisions, and they just couldn't agree on

That's just complete made up nonsense.

Some desktop environments used some draft versions, and everyone did it in a slightly different way, so that it wasn't a real standard yet.

That's not how anything works. An API getting further refinements and improvements - almost exclusively in documentation - doesn't make it "not final" or "not a real standard".

And many other window managers or desktop environments didn't even attempt it

Some niche WMs not suppporting an API doesn't matter to most app developers.

The global shortcuts portal is four years old.

That's wrong. You can't stream from the SteamOS game mode specifically, but streaming from a Linux desktop works.

xdotool should work the same in the Wayland session, assuming you give X11 apps the permission to emulate input. What about it isn't working?

uinput is not the proper way, it's emulating a hardware device.

The remote desktop portal is the proper way. Even xdotool works through that.

Plasma widgets are a gaping security hole.

Aka "thing that isn't sandboxed, never has been sandboxed, and never has been claimed to be sandboxed, is in fact not sandboxed". Just like any app from your distro repositories, or appimages, or games in Steam... Or even most Flatpaks by default for that matter.

Widgets being sandboxed would be cool and is a long term goal (which is way easier said than done!), but don't present them not being sandboxed as some irresponsible thing someone does because they don't care. Your expectations of security simply are simply completely misplaced.

What do you mean? Screen savers have been possible for many, many years...

VRR doesn't require additional bandwidth.