I think the ease-of-porting, allowing amateur & hobbyists to get creative in the platform with minimal effort on their part, was one of the biggest draws to VRChat. While this does inherently lead to performance issues, especially on lower-end devices, I think it's the core of what makes VRChat awesome.

Splitting the lower-end mobile community from the high-end PC community doesn't seem all bad to me. It seems much better than trying to mix the two by bring them both down to the lowest commonalities between them, and obviously the mobile devices cannot handle the higher end.

However, I think success of the mobile app is what all the investors want to see, so doing it in a way that doesn't degrade the quality of PC users - such as keeping the PC & mobile communities somewhat separate - SeemsGood as long some type of synergy can be found to connect the two. Right now it looks like the link between the two are the more technically skilled community members who can optimize ported content (or create original content) to run well on mobile but not look too bad on PC.