Use df to show disk usage. df -h is most useful.

I'd guess the odd usage numbers is due to sparse files. https://wiki.archlinux.org/title/Sparse_file

Nice one, thanks

Could you tell me which labs? Are they local to you?

had the mains water analysed for chemical and biological contamination

Can I ask how you go about doing that? I may want to test some water soon.

higher average fps

LOL

The Cloud Outgrows Linux, And Sparks A New Operating System

...which runs on top of Linux

windows

Wrong community.

Eh?

works better

What do you mean?

The render surface [is] handed out by the compositor

That's what I said. You're repeating what I said back to me.

It's not like games talk to the kernel and GPU driver directly to get graphical output

LOL that's exactly what they do.

there's a desktop environment they need to take into account

They do not need to take the desktop environment into account. They ask for a window and they render into it. They'll ask for a window using either the OpenGL or Vulcan API. Both those APIs abstract the windowing system away, the desktop is entirely irrelevant. Under Wayland, the compositor requests a buffer from the kernel, provides it to the game and then manages where on the desktop that buffer is rendered. The game's rendering is done directly (talking to the kernel and GPU driver) without going anywhere near either the compositor or the desktop environment.

The desktop environment means nothing when it comes to gaming. Except in so far as it may provide a GUI to configure aspects of the system that would otherwise be configured on the comand line or, for example by interacting with /sys.

This is why I asked what OP meant when they said KDE "supports" gaming better. Seems ridiculous. The desktop environment is not involved in game rendering. It has no impact. I'm mystified as to why people think it does.