Yo. 
Been a while. 
VRCHAT has a new competitor except it's made by potentially competent industry vets from japan. 
It's hard to top udon, but they just went public. 
And it's VR. AND mobile, and desktop, and android, and ios. 
https://cluster.mu/en 
And you don't need to speak moonrune to use it. 
Supports VRM, so you can directly export your VRC model into it. 
And it has world uploading. on UNITY 2019.2.21f1 , and uses the package manager to install it. 
Oh and easy prefabs for making things like real physics guns. 
I love vrchat, but it might get a run for it's money.