I extensively tested apex legends with different kernels and found a difference.

And Wayland accessibility is very bad.

I use flatpak steam and flatseal to remove user home permissions so games don't see my files.

I'd prefer to use Nix derivations and firejail but I couldn't get it working last time I tried.

My preference for nix expressions to flatpaks is for better reproducibility guarantees, easier introspection, easier debugging, and less duplication.

NixOS, and hopefully soon SnowflakeOS which makes it more approachable for more casual users.

https://snowflakeos.org/

Another user mentioned Guix, which I'd like to try soon to compare to NixOS.

It's hard to compete with how much there is in nixpkgs though... as much as I... a professional Haskell programmer... hate to acknowledge the realities of network effects.