I can't speak for the author, but I can speak from a similar path. Speaking for myself, I was self taught, and to even have a toehold in any kind of career I had to learn to prioritize advancement. Not having an educational or theoretical background, that meant evaluating "what seems most effective right now". I was late to adopt TDD, late to static types, late to FP, late to a zillion things... because I was prioritizing not being sent back to broke/poverty life. Once I had enough air to breathe I realized all of these things help serve me staying out of that misery, but the urgency of learning in the field doesn't always give room for that analysis.
