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
I am so hype for this actually. Never thought about it but no other source 1 game supports 64 bit except for CSGO.. so my theory is that this is the first step towards getting the game ported to source 2 someday!