I started using SuperDuper user in 2005 and was happy with it for a decade. Then one day in 2015 or 2016 it stopped working, and upon investigating, I discovered it used AppleScript under the covers. Even though I'd written AppleScript occasionally, it is such an obtuse programming system that I wasn't willing to spend any time trying to debug SuperDuper's script. And while I suspect David Nanian provides excellent support, I figured giving Carbon Copy Cloner a try would be faster and easier, and I've been using CCC ever since.