Been on Macs for 17 years and 0 idea what rectangle is and never heard of it
I am also one of those Linux desktop users who bought an M2 for power management and I don't understand how people can be satisfied with the out of the box window management experience. Every other environment supports hyper + arrow to move windows into a split view, windows, gnome, kde, whatever.
Not that I've ever stuck with one long enough. And I might have not done this at all with this latest Mac, I tried stage manager. But had gave up on that too last week.
This assumption is silly.
As explained GP used a customized Linux desktop for years. Switching from that to Mac OS' limited window management features can definitely motivate someone to google possible solutions as one of the first steps. I know because it was the same for me as well. I don't need an insane set of keyboard shortcuts but I think matching e.g. Gnome's default experience isn't too much to ask for.