If you're interested in how technology might cause self-interruptions that make things like sitting down with a book more difficult, I recommend checking out "The Distracted Mind". [2]
Ultimately, St John’s generates a lot of lawyers and humanities grad students, but not a whole lot else without extra pre-grad school to school to get some of the STEM prereqs out of the way. I love that the school generates humanities scholars, but it’s not my bag, so I moved on.
If I had the money, I’d love to go back and finish when I retire, but at 40 I’m already not as smart as I was in college, so I’m pretty sure I’ll be too dumb to be a useful classmate when I retire!
If you haven’t gotten to Euclid yet, do yourself a favor and get the Heath translations with his notes. A few of them are really, really hard for people trained in late second-millennia mathematics to be able to get through without some hints.
It was well worth it for me, at age 54, and for participants who were retirement age. At 40 you may be feel less smart than when you were younger, but you're very likely more mature and a better reader.
St. John's offers week-long Summer Classics sessions, which convey a lot of the same experiences of reading and discussion: