Makes sense - if you aren't using something, at least get some value!
For me the Deck is wonderful - I don't mind the size or weight, and I love SteamOS on the portable ... so much better than Windows!
I have no clue if MS will do an XBOX Portable, let alone do it competently - Sony has shown it is possible to both succeed and fail(and at the same time)! And they are much better at this stuff than MS. Nintendo has an amazing history, and the Steam Deck allows for playing about 100x more games than an XBOX system would.
I think I'll get the new Switch model. But I'll take a look if Sony make another handheld. And I'll certainly see what the next Stead Deck is like.