I think that would be a commercial decision? Why introduce something way better right away? I expect the M-series macs to be milked just like they milked the iPhone chips. M1, M1s, M2, M2s, etc. Small incremental changes so they can keep selling.

I Apple would introduce a radically faster M2(+much faster GPU) and >32Gb ram, with decent connectivity options, I would probably not buy another mac for 12 years again. I already use my macs a long time.