This probably isn’t the biggest deal, but I definitely second what’s been said in this thread.
A quick search for “mass entities” in the Unreal Slackers discord reveals significant confusion (mass confusion? 
) about what “Mass” is. For instance:
Ok. I’ve read the Unreal docs about Mass Entity and I for one, can say, I have no idea what it is. I’m a programmer and I’ve been out buzzworded.
I’m famliar with ECSs. Is Mass an ECS?