> ed isn’t quite flipping binary toggle switches to load your program, but close enough to deliver the joy of brutal minimalism along with a nostalgic waft of yesteryear.

ED is, well, miserable. It’s a character editor, vs a line editor, and you had the joys of paging in chunks of your file into working memory.

I, personally, find command line character editors especially difficult. I find it very hard to maintain my context and, of course, who doesn’t just love counting characters for commands.