While looking up a system crash on OSX today, I found that Console.app was reporting recurrent issues with two old programs that had been migrated to this laptop from prior one. Neither app was still in use, but their plist configurations (init.d type startup scripts) were still trying to run.
So here’s how I nuked them
find ~/ -name "*.plist" | parallel --dry-run 'rm -f {}'
rm -f
or mv {} $(basename {})
those out of the way.