Earlier today Valve made a new depot for TF2 called “x64_linux_test”. Maybe this mean well get a native 64 bit client ( and hopefully DXVK instead of ToGL please Valve) or this is just server stuff
https://steamdb.info/app/440/depots/?branch=x64_linux_test
https://twitter.com/DidTF2GetUpdate/status/1748525143700214007
But that’s not possible. It has to have some kind of 64 bit binary. It uses well over 4GiB of RAM.