I would say that the pattern is pretty clear - the first M1 MBA and MBP 13 were "transitional" models with the M1 put in old-style housings. The 24" iMac, the first ground-up Apple Silicon design, shows the new "Design Language" for consumer machines - multi colours with white bezels & keyboard - and now the M1 Pro/Max MBPs show the design language for "pro" machines - space grey or silver with black bezels/keyboard.
...except, as the article points out, the notch messes up the whole idea of the white bezel, because you can hide a black notch against a black bezel by making the "ears" black (i.e. no light emitted) but it's harder to hide a white notch against a white bezel by making the ears white, because you're trying to mimic reflected light with emitted light. In dark/fullscreen mode you'd need a honking great white light-emitting bar at the top of the screen, and in light mode, on the desktop... well, the notch would be less prominent than a black one, but it's not going to disappear.
Ho hum... no the notch is not important in the great scheme of things, but that doesn't stop it being stupid.