> Is this not the case anymore? It is but it has some drawbacks: 1) Play Mode inspection/modification capabilities are harshly reduced. Unity is years behind

> Is this not the case anymore? It is but it has some drawbacks: 1) Play Mode inspection/modification capabilities are harshly reduced. Unity is years behind re-implementing those. 2) Not all subsystems speak ECS yet. Many of them are still essential. 3) There is now a distinction between what you see in Edit and what you get during Play. 4) Serializing ECS is easy but de-serializing is still a pain. You have to keep track of GO's that hasn't finished their async conversion to defer de-serialization. 5) Yes, GO->Entity conversion is async so you need to manually wait for all conversions before your game can start playing.