Upgraded to Ubuntu 26.04, as one does. Only realized AFTER upgrading that it completely removed support for X11 and now xmonad doesn't work. 😭 My options seem to be (1) just get used to vanilla Gnome, (2) switch to some other tiling window manager, (3) downgrade to LTS 24.04 by overwriting my current system while carefully preserving my home partition. (1) and (2) are actually unthinkable. If anyone knows of any other options besides (3) I'm happy to hear them.