If it's a fast-paced action game, 60 is a must. If it's turn-based, or otherwise just slow enough to not matter, I'll sometimes accept a stable 30 - but only if it's truly stable, any dips below that are not okay.
Splatoon. You could definitely come up with plenty of cool movement abilities to unlock. And in general I just want to see the IP explored in all kinds of directions. If the franchise had debuted a generation earlier, I keep imagining what kind of straight-to-handheld companion title it would've gotten.
Why do you say that? Lots of other old games get remakes that don't try to completely change genre. Just because a game is old doesn't mean no one would play a faithful remake, that reasoning doesn't make any sense.
Hell, SE themselves have done faithful remakes of games that are much older. Dragon Quest III HD just came out and I hear it's been selling pretty damn well.
Yes it was. Plenty of developers who didn't already have an established audience to rally votes from complained about how difficult it was to even get noticed. And it invited a lot of shady tactics as other developers gamed the system to bribe or even bot votes, because if you're not doing that then your game will be left behind as your competition gets Greenlit first. Many perfectly good games got stuck in "Greenlight Hell" for a very long time.
Greenlight era had a lot of problems, and these problems are well documented. Valve dropped it for a reason. Don't start with the revisionist history.
So the market and ecosystem would have to substantially change before these kinds of ports could ever become viable. I doubt any of that is likely to happen.
You asked "has Nintendo even released a game?" and the answer to that question is "yes". They released 22 of them. I don't care where you wanna move the goalposts to, you can't say 22 games is "not really".