We've reported about how cloud saves will work on the Switch when the Nintendo Switch Online Membership launches later this month, but there seems to be some confusion about whether or not all games will be supported.
We've had a trusted source reach out to us to clarify matters. It seems all existing Switch games will support cloud saves; a developer can choose to opt-out of supporting cloud saves, but it seems opting out will be the exception, rather than the rule.
Here's what our source told us with a bit more detail:
All existing games will default to “enabled”. I specifically asked Nintendo about that and had that response. If a dev/pub wants an existing game to not support it, they have to ask.
When submitting a game, you are encouraged to enable cloud save. You have to have a good reason to not support it.
Reasons to not support it are generally based around preventing a user abusing it to cheat in your game. I can’t think of anything beyond Animal Crossing being too concerned about players rewinding their saves, but some games that give a random weapon drop, for example, might want to also prevent rewinding.
Let us know what you think about all this cloud saving malarky with a comment below.