Smells like stealth deprecation of on-prem Exchange
Honestly, it's hard not to hear the black helicopters overhead from this latest screw-up with MSFT's avowed intention of forcing everyone into the cloud. Although, since a hybrid Azure deployment still requires Exchange servers on prem even if all mailboxes are in EXO, it's hard to know if it's Exchange or simply on-prem AD they're really after. (I joke. Kind of.)
That said, it's classic business as usual with Exchange CUs. While the window between OS patch releases and production deployment has increasingly narrowed in my little world, there's very little that'd induce me to apply an Exchange CU less than 2 months after release. In fact, in recent years, there have been perhaps two I've applied within a month. (Applied other workarounds for a few others in the interim. )
For even the "super urgent" ones, I've waited at least 10 days after release and carefully reviewed the changes... and waited for the screaming to die down and the fixes to be released.