“I think you can be a level-90 developer within a few months (less than a year I think?). To be a level-100 developer? Unclear.”
As a mid-level professional programmer, having only been programming for 8 years or so (after getting my degree in CS) the idea that you can be a “level 90” after a few months is not only laughable, it’s insulting. If you think you’re that far along after a few months in any craft, it’s because you can’t see far enough.