My words definitely could've been better. I was referring to "portability" as the gimmick here since it's not the norm in the industry for primary console. Nintendo did handhelds for years, but that was also a secondary thing to their primary consoles. Having their only console also be handheld was what I was referring to as the gimmick here, but I understand the argument that that's not a gimmick.
As for naming, I think it'll be fine since they're using numbers. I'm not in the position of a middle aged parent who's getting a gift for a child, but the fact that Sony has successfully done it for this long makes me feel that it'll work.
Add a letter to the end is awful though. It took me a bit to nail down the Series X vs Series S Xboxs (granted, I haven't owned an Xbox in over a decade). The Wii U definitely confused people as well.