Game-key cards are different from regular game cards, because they don’t contain the full game data. Instead, the game-key card is your “key” to downloading the full game to your system via the internet.
Pay a premium for a physical copy of your game, and the cartridge may not contain the actual game. Only on Nintendo Switch 2.
Like I said, to me, the differences are not as cut and dry, it depends on you situation.
As for the virtual game card, Nintendo actually uses eject, load, and borrow in their article, so it sounds to me it’s basically like a physical game you have to move between consoles, not just simple check.
Ceremony can be a PITA,.no argument here.
But I would be shocked if Nintendo made a digital “eject” erase anything on the local console.
Yeah, it would be insane if the game’s also uninstalled, but that second system still needs to be at hand or someone needs to “eject” it. It’s a really dumb system.