Tangential to your point, but how did 'unit tests' end up in your list of complicated things? They are conceptually easy to understand, and they are certainly n

Tangential to your point, but how did 'unit tests' end up in your list of complicated things? They are conceptually easy to understand, and they are certainly not only for large scale enterprise users. Granted, it takes years to learn how to write nice tests... maybe that is what you mean?