Rendering is much more 'pure cpu' work, so you most likely won't see much difference there due to this work.
The most sensible hypothesis I've heard about it is that THP really helps with large rendering loads, and Windows doesn't do that yet.
As for bug reports, well https://twitter.com/bgolus/status/1080213166116597760
In my experience in interacting with them, most of these small indy dev teams use Unity or Unreal or Godot these days. Outside of graphic design, the graphics don't really cause big issues any more. Having a team of a handful enthusiasts but often slightly inexperienced programmers figure out the flaws in their own game logic is.