I don’t understand, it seems like MLAPI will be official. ECS is kind of future of Unity too, and AFAIK it also has its networking solution? So there will be two Unity game architecture approaches with two networking solutions? Am I right?
You are right. For now there will be two game architecture approaches for multiplayer.
We have the experimental MLAPI package which we just released today for GameObject based multiplayer and the DOTS Netcode package as a preview package to use together with the ECS system.