Yeah, I’m just guessing that sleep is less disruptive than hibernate, because the ram never even has to be unloaded and reloaded.

Edit: seems like I’m wrong, doing some searches shows that people with the ROG Ally are disabling sleep and forcing the Ally to hibernate mid game. Doesn’t work for all games, but does for more games than sleep. People also report that the Ally was frequently waking up on it’s own from sleep and overheating in their bags, and that wifi would stop working after sleep, so definitely sounds like hibernate is the way to go on windows devices.