I never had a Nintendo childhood, as I'm too old (grew up on Atari 2600, et. al.) I still find a lot of fun in that little machine. Even the Ring Fit game, which is a fitness game in case the title doesn't give it away, I find to be a lot of fun. This despite the fact that I run quite a lot (as in, trail races over 26 miles) and should probably poo-poo such things, but it's enough fun to fire it up once in a while and it can give me a workout even if it just takes a few rounds to get there.

Not that I'm negating your point. The fact that I can download just about every first-party game from decades-old Nintendo console says there's something to the nostalgia theory.