Steam beta gets native Apple Silicon support — the only public Arm version of Steam
(www.tomshardware.com)
Right, I'm not talking about Steam, I don't think misk was either, the context is Apple transitioning to ARM silicon.
Also Steam definitely runs native 64 bit on x64 systems. It's intended to run in either environment, and so will have 32 bit deps, but if you start Steam, the actual executables you're running (e.g. ~/.local/share/Steam/ubuntu12_64/steamwebhelper) are 64 bit ELFs when needed. And, of course, games run in 64 bits and link to a 64 bit steam client library.