The curious case of T-Mobile’s 3G shutdown date

UMTS network closure data was originally October 2021, then it was April 2022, and now it’s back to October.
T-Mobile in the US, as far as Telecoms.com can tell, doesn’t give a breakdown of subscribers by cellular variant. It’s impossible to say, then, how many might be scratching their heads about the shutdown date of the operator’s 3G W-CDMA network.
Perhaps there aren’t too many, which might help explain why T-Mobile doesn’t seem overly fussed about changin