How much can Cloud Storage realistically do? I plan to buy physical as much as possible, but for someone who wanted to say buy Breath of the Wild digital copy on the Switch (which we know uses nearly half of the systems memory) could the game be downloaded to Cloud Storage? Even I think this sounds a little silly, but I was still curious enough to ask.
I don't think you understand what cloud storage is.
It works like this. You buy a game for your Nintendo console. If you bought the physical version, you just slip it into your console. If you bought the digital download version, you can just download it to your console whenever you want.
Either way, you'll want to save your game progress. This progress is saved to your SD card, of course. But if Nintendo uses cloud storage, then your saves will
also be uploaded to Nintendo's servers, where you'll be able to download them again if something happens to your Switch, your SD card, or maybe you just want to play your save on a friend's Switch. The latter should be as simple as logging into your Nintendo account and letting it download the save. (Nintendo may not allow this, mind you, but there's no technical reason you can't do it.)
Cloud storage is basically just a backup of your game saves,
not the entire game.
They might store your screenshots online, too. I don't know. Again, no technical reason they couldn't, just depends on whether they want to and have developed any useful services around it.