I can definitely agree with suboptimal. While it’s certainly not an end-all/be-all solution, it did exactly what it was designed to do. People spin up machines through Virtmanager for many reasons outside of gaming, me included, but when it came to gaming specifically, rebooting your system to play one game, and then switching back, didn’t make any sense. Wine and Proton were not nearly as mature, as they are today.
Needless to say though, this is not the kind of setup you would run on an underpowered machine. With 24 threads of CPU performance, 32-64gb of RAM, and a full GPU, I can’t really name a game that would exceed the limits of what is allocated