>For the autodidact it is a time to begin choosing modules that make sense for their own career trajectory.

I think the end of his part 2 courses is a good point to pick a set of courses that will get you to your desired end state. I would also say that completing these courses would establish sufficient mathematical literacy for many purposes.

I would love to see similar guides for other subjects. Personally, I would be interested in guides for chemistry and mechanical engineering.