I'm a Vim user and this is the only Sublime feature that I think I'd like to see in a future version of core Vim. Another comment called it "syntactic sugar for macros"[1] and that's true. Multicursor functionality allows you to avoid repetition in so many cases that it's worthy of inclusion as a feature in its own right.
I think what we already have in vim is even better: just use dot (.) to repeat the last action. So you make some edits in your first cursor position, move to the next cursor position and press dot to repeat the edit.
No offence, but that's the typical kind of comment coming from someone who's never actually tried multicursor functionality. The thing about multicursor is that it's seamlessly integrated not only with editor commands, but also with commands that create multicursors.
Examples:
- Cmd-Shift-L creates a cursor at the end of every line of the selected area.
- Find all, integrated with Regex, creates multicursors on every match.
- Once you get multicursors, you can still add some manually by holding down Cmd and double clicking at a cursor position.
After you get multicursors, you can then move them around using standard editor commands - that's the real power of this construct, since I'm able to match something much simpler than I actually want to edit (for example end/beginning of line), move to the meat, edit.
[1] https://news.ycombinator.com/item?id=5504507