i always liked my GC and PS2 memory cards. plus the cases all came with slots. Man everything about the gamecube was tough. the system, especially the controllers. even the disc cases! it's only flaw was the small disc and lack of dvd player!
Nintendo Switch has cloud saves as part of the subscription, but as an opt-in feature for devs. It is anyone’s guess whether a given game will support it. Never mind that the store software feels like it is literally more than a decade behind Steam :/