The other comments pretty much covered it, but a small nice thing that a port of the game can do that an emulator can't do is increase the draw distance and disable the LOD to always draw maximum quality models
Your feature request is pretty specific then. You could program it yourself, since all these projects are open source. You don't need to make a whole new project, just add to the existing code.
Harmful misconception I noticed in these comments. Lemmy's Hot leans way closer to New than Reddit does, and it makes it look like we have low activity (low comments and upvotes)
Reddit Hot All: posts are about 2 to 8 hours old
lemmy.world Hot All: posts are about 4 minutes to 1 hour old
I don't think we should be limiting new users from commenting or posting. And 7 days is a long time.
Auto closing communities would be really annoying, but I think dimming them or marking them in the lists/search results would be nice. I filed an issue on this already https://github.com/LemmyNet/lemmy-ui/issues/3174 maybe if more people think this is a good idea they could leave comments there
The other comments pretty much covered it, but a small nice thing that a port of the game can do that an emulator can't do is increase the draw distance and disable the LOD to always draw maximum quality models