Multi-cursor/multi-selection as a built-in thing. I'm aware that you can kind of hack this together, but all of Emacs assumes that there will be one selection a

Multi-cursor/multi-selection as a built-in thing. I'm aware that you can kind of hack this together, but all of Emacs assumes that there will be one selection and one cursor, so hacks don't really integrate nicely with the rest of Emacs.