User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-26467247-20201116084423/@comment-1038387-20201116092149

There's a native one in the 2017 Visual Editor, but it's inferior. It only allows single line and is slow - I had to change 322 instances of one thing on a page and the 2006 editor and script could do it with no issue and this one froze and timed out.

I ended up just copying the entire article to a txt file and used Notepad's FaR. Also doesn't allow multiline. I guess if I ever need multi line replacement, I'll just use AWB or something.