4.21 branches in both repo’s are live and appear fully functional, I have some patch notes I will post weekend for the other engine versions.
was a very light engine update (aside from a lot of physx API changes) so it should be a pretty stable platform.
Edit I’ll note that I still have to keep some hacks that I added in 4.20 in, one for the camera to prevent the late updates from doubling up in multiplayer, and one for the physics replication to stop it projecting ahead when first gripping, if you notice the #hack tag in the code, they are there until the engine base classes are fixed.