I'm not sure how people typically use neovim, but in Zed I find multiple cursors (especially combined with multiple file buffers) extremely ergonomic for refactoring quickly and easily where tools like find and replace or simple renaming doesn't suffice. It lets you scan through and add cursors where you need them, then perform your edits across locations and even files all at once. It's so nice that it played a significant role in me keeping Zed early on despite it missing a lot of extensions I used in VS Code.
Not sure I under the Zed argument, VSCode has supported milti-cursors since the very beginning. It was made popular (not invented) by Sublime Text because it made it reaaaally easy (middle click+drag), so Atom and VSCode carried the feature.
I am so used to sed-style, regex powered find/replace, that this use admittedly never occured to me. As a result, multi-cursor seemed mostly useless outside of pair programming that I never do.
I will have to try it out once it lands in neovim just to see if I can wrap my muscle memory around it.
I've always told myself I should learn to do these sed/regex find and replace techniques, but my origins are not sophisticated and I use computers like that orangutan hammering nails in the video with David Attenborough https://youtu.be/IFACrIx5SZ0?si=NcWGBNq272KoYB2i&t=84
It's entirely possible that you don't need multiple cursors
For me the nice thing about multiple cursors is when it would take more time to write the regex than it does to just throw down say 8 cursors and update the spots.
How do you place the cursors then?
In vim?
Ctrl+v, 8, j, shift+i, add the text, Esc.
Which works if you need to edit several aligned lines in a row. The one thing I'm missing is putting the cursors on the next found position of a search term which would make it much more useful.
There’s an overlap between “Find and Replace” and Macros, but it’s too small for multi cursors to be particularly useful for me. Especially with emacs where I can bring up all the lines in a separate buffer and edit them there (occur-mode) or do the same for a set of files (grep-mode and wgrep)
You have very convenient macros. If there is something you want to do in places you are going to mark first then you can just execute it right there instead. If it's just one edit you just do it right there without macro and use the dot to repeat it in more places.
If those places can be created automatically then again it's just a macro you execute over many lines.