Thanks for weighing in on this unusual topic too! I have a more fluid, serendipitous, unstructured view of "mentorship"—the kind I received and try to provide on StackOverflow, GitHub, etc. Any community member with more experience than me could give a drive-by comment on my question/answer (StackOverflow) or pull request/issue/repo (GitHub) and I learned "the right way". On Wikipedia, my experience has been unceremonious reversion of my edits, no explanation.