Don’t you also need to juggle two keyboards and mice with these “solutions”?
With a KVM switch you’re controlling the inputs and the outputs. Press button A and the keyboard links to PC-A and the monitor displays PC-A, press B etc.
Only hiccough in the system is remembering which PC is which, I run my main PC in “dark mode” in the settings (i.e. everything defaults to black), and the backup PC is as normal with white windows/menus etc so it’s really obvious which one is running.
