Yeah it's odd. Huge amount of arbitrary cuts offs happening on the Mac side. Given 3rd parties can enable both Big Sur and Monterey onto pretty much all post 2012 Macs, Apple really should be supporting them as well.Apple's strategies on iOS and Mac are in such contrast to each other. On the Mac side the support cutoffs have become completely arbitrary and really only explainable by planned obsolescence / cost reasoning. On the iPhone side someone actually seems to care about supporting older devices.
iOS and MacOS support spans have almost converged, it seems like pretty soon iPhones will be supported for longer than Macs which cost twice as much or more.
I've said it time and time again, but recycling is all well and good, but extending the useful lifespan of devices is also hugely important.
It's insane that a 2014 iPad Air 2 can run iPad OS 15 but a 2014 MacBook Pro can't run Monterey..