Lots of folks knew the RWD/SR Y was coming from Bill Wrights posts (he works at GFN) last month.
See for example:
https://twitter.com/BillWri90307793/status/1339479224390799361
Where he originally kinda leaked it Dec 17
and then:
https://twitter.com/BillWri90307793/status/1344246733379751936
Bill replying to Troy with a "Yet" on the SR Y not being released
What's weird is Elon previously said (July I think) that they hadn't released one because range would be <250 miles which is unacceptably low and instead they'd do an LR with a single motor as the cheaper option.... and on the Q3 call Elon (responding to Rob Mauers question this) said going forward they'd consider 300 kind of the minimum acceptable EV range...
But now they're releasing a single-motor SR instead with...range <250 miles (not by much, and I think the offered range is just fine for most folks- but still odd in context of what he said earlier... )
Possibly they just weren't saving enough on doing an LR RWD to make it worth existing- or possibly they figure 244 IS acceptable after all since (as Rob noted when he asked the question on the Q3 call) by using less cells in an SR helps a company that is still gonna be battery limited going forward because overall demand is gonna remain so high going forward).