Hard disagree. Of course technically they didn't do anything explicitly against the public guidance (the checks and balances would never let them), but naming a model with a date very strongly implies immutability.
It's the same logic of why UB in C/C++ isn't a license to do whatever the compiler wants. We're humans and we operate on implications, common-sense assumptions and trust.
It's the same logic of why UB in C/C++ isn't a license to do whatever the compiler wants. We're humans and we operate on implications, common-sense assumptions and trust.