T-Mobile might be making way for the Pixel 4a by pulling the Pixel 4 XL plug

Curiously enough, the mid-end Pixel 3a and 3a XL are still sold through the nation's third-largest wireless service provider, so it's hard to tell if this early Pixel 4 XL retirement has anything to do with the impending release of the Pixel 4a. What we can say for sure is that recently leaked 4a prototype looked pretty much ready for primetime, so we wouldn't exactly be shocked to see the trendy hole punch-sporting mid-ranger unveiled in the very near future.
Of course, that's little more than conjecture on our part, especially seeing as how the Pixel 4 XL is still available from all other major US carriers, authorized retailers, and Google itself.
Besides, T-Mobile sometimes randomly pulls the plug on certain phones only to reconsider its decisions and reboot sales after a while. Then again, one eagle-eyed Redditor points out Samsung's non-5G Galaxy Note 10+ variant also vanished from Magenta's stores a week or so before pre-orders for the Galaxy S20 family started, and the S Pen-wielding 6.8-incher has yet to come back.