This appears to be their plan. It has steadily ramped up since Mojave, and Big Sur was the inflection point. I have used OS X exclusively since 2008, and last year I made the choice to no longer upgrade any of my machines beyond Catalina. I'm slowly getting used to the fact that I won't be able to use Macs for my work in the near future, and am making adjustments to my workflow accordingly. I know this is probably the life-long FruitCo® fan in me speaking, but I'm genuinely distraught about this. My absolute favourite software platform in the world is being chipped away at to appeal to the lowest common denominator. Even worse, most people seem to be cheering them on for doing it. Really upsets me.