> But I understand why Nintendo doesn't want that
This part I really don't understand. Nintendo has clearly got the technology at play to run everything at least prior to the GameCube on the Switch, ready to roll... but the only way to access those games is to pay for a subscription service which is already kind of annoying, only to then get a drip-feed of a few games every few months, selected by... somebody, no idea who, with no real consistency as to what makes the cut and what doesn't. It's, by all accounts, completely fucking arbitrary.
I love the Switch, it's IMO, the best console Nintendo's turned out in actual decades, and if I was given the option I would buy the shit out of a large library of games from previous Nintendo consoles, and given how many 3rd party projects have made playing those games on all manner of shit, chiefly desktop PCs, a possible thing, I struggle to really sympathize with Nintendo here. And again: the groundwork for this is already laid. I don't know how much work goes between, for example, taking a SNES title like Super Mario RPG and putting it on the Switch's virtual SNES console, but given that their virtual SNES has essentially the same features that every bog standard SNES emulator has had for over 10 years... you'll have to forgive me if I don't think it's much? If any?
I would absolutely understand if they want to playtest each game, make sure it's optimized, make sure there's no graphical oddities, etc. etc. but like... you can do that. I could do that. And hell, if a game made it through with some big glitch, give me the option to send your devs a fuckin email about it in-game with a dump of the memory at the time it happened so they can fix it.
But no, instead, peacemeal releases of games, on a subscription service only, that range from absolutely S-tier iconic to... what the fuck is this in terms of cultural significance. Instead of just a bloody storefront, and let me pick what I want, and pay a reasonable price for it. I'd bet anything if they charged like $9.99 per game for the entire library of NES, SNES, and N64 titles, they'd be absolutely swimming in money.
Like... the big corpos have never understood, this is what gave Steam the position they have now. Piracy is work. Hacking consoles is work. Installing and playing cracked games is work (and risk!). I don't want to work, I want to fucking play Donkey Kong. Give me a legal way to give you a reasonable amount of money so I can play Donkey Kong! And then I get Donkey Kong and you get money! It's the dictionary definition of a win/win scenario.