essentially made all your games run within a sandboxed instance which has a limited set of binaries that emulate another mini OS within your primary OS.

Isn’t it just library bundling? It’s not like it’s running inside a virtual machine or anything.

I can see the Rocket League process right there when listing my user processes, e.g.

There are so many conflicting reports regarding the performance on Flatpak, for Steam but also in general, so I don’t know what to believe.

At least one source said the performance overhead is negligible on modern hardware, so I think I’m gucci.