Part of the AI day video had a QA where Elon said "I discourage use of machine learning because it's really difficult. Unless you have to use machine learning, don't do it... 99.9% of the time you do not need it".

I'm not really familiar with machine learning and how it differs from the type of work Tesla does with self driving software. I guess I was under the assumption some form of machine learning was being used for self driving?

Anyone have some insight on what he means by this? Maybe some examples of where we see ML being used today where it doesn't need to be?