* An Apple executive said recently that they want to release a huge upgrade every year. They don't want to hold back.[0]
* M1 used A14. M2 used A15 (even though A16 was already out). This seems to suggest that Apple wants to make use of every A series iteration. The A series gets a new gen every year.
* It seems to make sense business-wise that the base M will at least get upgraded once a year. It isn't too much more effort since the iPhone funds most of the development. The base M chip goes into the following: Macbook Air 13", Macbook Air 15"(expected to come out in a few months), iPad Pro 13", iPad Pro 11", iMac, Mac Mini, iPad Air. It's valuable to update these devices once a year.
* We weren't in "normal" years. Covid, supply chain issues, work from home, gigantic demand followed by demand collapse likely contributed to delays.