If it slows down every day, it means that it's not up to the task in that environment. Do we think M3 Pro/Max is going to have the same thermal boost "feature" that Intel and AMD have? As in having the CPU run higher (across all cores) than what it is rated ...
The VR market still an order of magnitude smaller, so it’s understandable that the games are less ambitious on average (because the return on investment for developers is smaller). And yet, there are VR games out there which rank as highly as some of the best rated non-VR games ever....