I'd suspect folk with a terminal first approach probably have much stronger understandings of what is going on under the hood which makes approaching new repositories a lot easier if nothing else.

Alternatively, maybe folk who're exposed to more codebases are the best off.

Or combine the two for wizard.

By "modern IDE" I meant something like Turbo Pascal, as compared with the (at best) ISPF-based editor the mainframe guy was using. This took place in the early 90s.