Sounds like you have all the data you need then. The only (minor) pitfall with a Series S is that one can't buy actual games as gifts for kids, as opposed to gift cards/codes, but that might be an academic issue at worst.

I'd recommend branching out with the game selection too; if you restrict yourself to only first-party titles in terms of Microsoft published stuff, you're going to have an even worse time than you were when depending on just first-party Nintendo offerings, in terms of waiting for releases.