This is true, but I got the impression that the M2 Pro and M3 Pro were both an outlier; the first in being late and the second in being an early stop-gap, because the M4 Pro wasn't going to be ready until late 2024. I get the sense they would've preferred to skip M3 Pro altogether (ignore the numbers for a moment) and have M1 Pro in late 2021 (check), M2 Pro roughly 18 months later (they got that earlier), M3/4 Pro another 18 months later (which it looks like we'll be getting).
But I could be wrong. It could indeed be that extenuating circumstances such as COVID-19 required Apple to reschedule.
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