Mentorship doesn't have to be interactive. My first boss mainly mentored me over email. In fact, my first job largely worked over email and it was a bit of a culture shock when the next one was largely instant message based and also had daily meetings as well. I felt a bit like I had gone back to infant school.

It may be a bit harder now because as programming became more high level, the cadence of development went up. However I think the skill set that you gain when you are force to work at a lower cadence (and spend more time "sharpening the axe") is still valuable.