When I have a big edit I'll just pop open a vim window. I cut the text out of VS Code or whatever wretched web editor I have to use for some online App and paste it into the vim window, edit, then cut and paste back into the original window. When they come up with a variant of a pathetic markdown box that supports :%s//blah/g I might consider the internet ready for prime time.

The best thing about modern GUIs is they let me have a zillion command lines open at the same time.