Looking at this post: There is a certainty that some games such as TF2 will not run better on Linux when compared to Windows. In TF2's case, this is because it lacks Vulkan support on Linux, so it is running on emulated Open-GL.
There is also a problem with older Intel / AMD integrated...
Possibly out of fear that there may be even far worse ramifications that could occur if TPC discovers another site, such as a lawsuit or something. I can't personally speak on the costs of hosting a site but having to constantly pay for and construct new sites would probably be exhausting...
Awesome! I had to create a custom build from source code as noticed that you cannot setup controls anymore due to the Unity Game Configuration window being removed in more recent versions of Unity. It would be nice if support for customizable keys were added in a separate menu or toggle. If not...