A few years into the generation they updated the Xbox One, putting it into a smaller form factor called the Xbox One S, and at the same time released a spec bump model called the Xbox One X. I don't believe any of these are still available for purchase.
The new generation has the smaller/lower-powered Xbox Series S, and the higher-specced Xbox Series X. Leaving the overall generation with seemingly no name, other than "Xbox Series" I guess?
But yes, the names are terrible because S and X both refer to consoles from last gen and current gen.
(Tiny rant - and even THAT name sucked. Internally, since it ran on DirectX (already a name that only a mother could love), it was called the DirectX Box. And rather than come up with a real name, they got attached to their lazy idea and shortened it to Xbox. They have made miserable naming choices for this thing since day one. Since BEFORE day one.)
It's a pretty good name actually because it's unique, easy to Google, and is never ambiguous in conversation. It's all the suffixes that made a mess of it.
Nintendo, the company who released the Wii, wiiU, gameboy color, game boy advance, DS, 2DS, 3DS; all of which are similar but vaguely incompatible?
This lead to situations where you could have a new 3DS that wasn’t a new New 3DS, and didn’t play the games you bought with it. You could also, somehow, have an old New 3DS, a logical impossibility.
Anyone in charge of naming anything that just calls it the “new” thing should be fired for not taking their job seriously.