Yeah, not everyone is the same, but there are definitely people interested in multi-cursor modal editors, enough to build their own, eg. vis⁰ — a light, fast, and simple text editor with a pretty standard vim normal mode but sam’s structural regex command language¹ for creating and procedurally editing selections in command mode², and kakoune³ — known for switching vi’s word order from verb noun to noun verb, so typical normal mode commands work by first creating one or more selections with motions (no need to press v), and only then operating on them. And of course Emacs has multi-selection modes and AFAIK they’re compatible with evil.
As someone who never used a multi-cursor IDE (I've seen other use it but not in a convincing way): what's something that you use this for that you don't think vim can do?
The main purpose I've seen is basically block mode (like ctrl+v) or (iirc) repeating things on multiple hits (like n. or indeed cgn).
There's a vim extension for multiple cursors but it's a little buggy.