I never destroy the source code directory. I still have projects from 30-odd years ago that get looked at from time to time for some silly reason or other. I m

I never destroy the source code directory. I still have projects from 30-odd years ago that get looked at from time to time for some silly reason or other. I move the project directory out of the main work area where current projects live to another area like 'obsolete' or perhaps 'non-current'. It still exists, but it isn't continually in your vision. Disk space is cheap. Your time and angst are not.