People are acting like this is an active threat that they'll flip a killswitch and remotely brick Switches, but it reads more to me like they want to scare you into not tampering with your console by suggesting that it could break.
I agree, it's important to preserve things today because it may be too late tomorrow. Some Switch titles have already been delisted, so it's good that we backed them up early.
But I'm just explaining it from Nintendo's perspective. If the tools we use to restore Super Mario Bros. 35 can also be used to crack Tears of the Kingdom, they don't want those tools in our hands.
The more important point though is that it is all cat-and-mouse, and the mouse is winning. We have those tools, and they can't fully stop it.
Nintendo can't control anyone else's hardware, they can't stop you from doing what you want on a Raspberry Pi. They're trying to crack down on Switch modding, but even that's just a cat-and-mouse game.
You will not get in trouble for emulating at home. Emulation itself is legal, it's only illegal to download games you don't own. But it's nearly impossible for anyone to get caught doing that, and very obviously not worth any lawyer's time to pursue individual end users for pennies in damages. You are safe.
What Nintendo wants to do is attack piracy at the source. They can go after sites that distribute ROMs, but those are like a hydra, kill one and three more take its place. Then there's the likes of Yuzu and Ryujinx, where Nintendo claims to have found some technicality about these emulators having something they shouldn't. But the forks are still being distributed, and you the end user will not get in trouble for downloading the fork at home.
Note that for the most part, they're really only concerned with protecting their current hardware. They've never gone after Dolphin, Snes9x, mGBA, etc, because they know those are battles they can't win. Considering how aggressive Nintendo is on the battles they do fight, it's clear that anything Nintendo doesn't go after is something they can't go after.
That's plenty for retro emulation, probably even overkill for the systems you can emulate on that RK3326 chip. I've been rocking a Miyoo Mini Plus which I picked up for about the same price two years ago, and that has 128MB RAM.
You get what you pay for, these obviously aren't meant to be high-end cutting-edge devices, but for the price they're a pretty good deal for all the classics you can play.
This is partly the case for any game that receives significant updates as well. Your disc/cart contains 1.0, but is that the version you will want to play 50 years from now when you can't download updates anymore?
Skullgirls - Still the best damn fighting game ever made. I've been grinding for a full decade now, and I'll be entering Combo Breaker 2025 once again this year.
Slay the Spire - The game that ruined all other roguelikes for me. What I love about StS is that it never lets you get complacent, never lets you lean on just one good synergy that will carry you the entire run. You always have to keep adapting, and you have to have a well-rounded deck to deal with enemies that are designed to counter players who try to rely on only one thing. And when I eventually got to the point where I'd had my fill of vanilla, there's so much fun stuff from the modding community to play around with. Packmaster is incredible.
CrossCode - It's been years since I finished this RPG and its colorful cast still lives rent-free in my head. This is a game that is perfect in every way and adds up to more than the sum of its parts. Fantastic combat, tons of side content, endearing characters, emotionally powerful story, beautiful visuals, amazing soundtrack.
Measuring games by hours has become an increasing less useful metric to me because I already have my grinding games that I can endlessly replay. When buying new games, I'd rather get something I'll really enjoy for a short playthrough than a long epic JRPG I can't bring myself to actually set aside time for - even though I do really love JRPGs.
There are very few games I would spend $80 on. Actually, at this point I don't buy a lot of new games to begin with, I'm mostly just grinding the same old favorites now.
But for the games I really care about, I'm willing to spend on games I know will be worth it to me. I've waited 22 years for a sequel to Kirby Air Ride and if I have to pay $80 for it, I will pay $80 for it.
I thought Game Key Cards, while not something I would ever buy, weren't the end of the world if they were just meant to replace the existing practice of code-in-a-box for games that won't fit on a cart. It's actually less bad than that, so I didn't get out my pitchfork just yet.
But the sheer number of games being released in this format is alarming. Code-in-a-box was rare, this is looking like it's outnumbering proper physical games. And many of these games don't even make sense to be key cards, they can fit just fine on a cart. There are ports of Switch 1 games that already fit on Switch 1 carts in here!