Git. Most people have no need for 95 percent of its features and don't have a good mental model of how it works. Just copy and paste commands to get it to work, more or less.
I think if the interface were better, fewer people would be copy pasting git commands.
Maybe we’ll have more agentic SCM that auto solves merges and all that fun stuff in the future. But for now we are stuck with a pretty challenging piece of software