I somewhat agree, even without thinking there must be a fixed cycle for silicon updates, but seeing M2 > M3 taking as long as 2 years is quite alarming and that we all expected at least some M3 products to have already dropped by now.I guess I am thinking in terms of the processor roadmap rather than in terms of products released.
M2 was released in 2022, 1.5 years after M1. The M2 Pro/Max/Ultra came out in 2023. The M2 Mini got held back because the Mini was also getting the M2 Pro, so it makes sense to release the Mini with the Pro/Max chips.
I would expect M3 to come out this fall (1.5 years after M2) and then all the M3 Pro/Max/Ultras in the first half of 2024.
Though looking back at this year's Mac launches, it was already retroactively "confirmed", judging by the Jan M2 mini / 14" 16" release videos, that they were intended to be announced in Oct / Nov 2022. There also had been numerous rumors in the past saying the release schedules had been pushed back for pretty much all Apple Silicon Macs after the initial M1 launch. It may have to do with COVID, the lockdown in China, and general supply chain voes, and then now the "recession" impacting Apple's marketing decisions.
It seems at the lower end of Apple Silicon, they may still enjoy a pretty decent TDP lead but you can't say the same with Pro / Max / Ultra, or even the not yet existing Extreme. If Apple were to remain competitive at raw computing power on the higher end of their offerings, they really need to roll out new generations sooner, especially considering the IPC gains and new hardware features we already see on A17pro. Thus this Gurman newsletter saying the 14" 16" may come sooner than the 13" 15" actually makes some sense, if the M3 is rolled out before this but on devices other than MBA, as in iMac, 13" touchbar, or even iPads.