Remember the Macs that haven’t seen an Apple Silicon refresh will be staggered releases, 27” iMac spring or summer 2022, Mac Pro summer or fall 2022.
I wouldn’t be surprised to see M2 MBA in spring 2022 and 27” iMacs with M2 Pro/Max next summer, despite most people assuming they will only get M1 Pro/Max. The 27” iMac will only get M1 Pro/Max if it releases earlier than WWDC 2022.
If we are going to get an M1 Pro/Max Mini it will likely be a press release launch before the M2 launches. Otherwise it will be an M2 option.
I think the Mac Pro will have multiple M2 based SOCs not M1 (M2 Extreme).
I don’t think the M series have to be annual upgrades, but they may be down the line once the form factors have stabilised.
It’s going to continue to be a bit chaotic during transition (until 2023).
Come 2023 we might settle down to M3 MBA/Mini/iMac in spring, and M3 Pro/Max MBP/Mini/iMac Pro/Mac Pro for WWDC.
I don’t see an M3 launching at same time as A16, I think we wait from fall to spring for A series to M series.