> in my experience aerospace is way better in most ways.

As an Amethyst user, I'm approaching this comparison from the other direction: is there one compelling reason to switch?

The improvement I'd most like to see in Amethyst is more stable window placement when I remove a monitor then add it again (I do that a lot with my laptop).

It would be fantastic to have integration between Amethyst-managed spaces, Firefox windows, and Proton Pass vaults. As in Space 1 knows that new windows should use the Google account in my Work vault, and Space 2 knows that new windows should log out from Google because there is no Google account in my Personal vault. I doubt that's an imminent prospect, though.

In general, I prefer the Amethyst approach of extending the builtin OSX window management to the Aerospace approach of replacing it. Clearly the Amethyst developers weren't convinced that it's impossible to move windows between spaces with hotkeys, because they went ahead and implemented that.

Overall, I'm really happy that these window managers are being written. I use a 42 inch monitor, which would be awkward without them.