Replace multiple selections while preserving capitalization of the replaced text.
Build or grab the kak-recase binary from a release and put it in your path.
Add eval %sh{kak-recase --generate-config} to your kakrc to define get the recase command.
Create a bunch of selections, then run the recase command.
Enter a string to replace with,
and watch the selections be replaced with the entered string,
but with the capitalization of the original selections.
I recommend binding the command to a user key, like map global user c ":recase<ret>".