In KDE Plasma 6.6 Spectacle can read texts from screenshots, a new on-screen keybord is available for testing, a first-time wizard was added, current theme can be saved as a new global theme, emoji selector got a new easier skin tone selection, you can now connect to a Wi-Fi network via a QR code, application sound volume can be changed by scrolling over a taskbar button via mouse, and there is much more.
Yeah, I've done that occasionally, too, but it adds a load of friction for moving windows between screens, in particular also when un-/replugging the screen, so it's still painful enough that I don't bother with a second screen.
I guess, it also plays a role that I do use lots of workspaces, so it's 1) extra painful and 2) I don't have as big of a need for a second screen, since I can just switch out what first screen displays very quickly.