A bunch of useful insights in your reply. I really liked the insight of User Interfaces getting simpler while developer experience getting more complex. A counter argument that comes to mind is how violin has the most difficult UI - but a lot of people spend lot of time mastering it and enjoy creating music from it - often independently or in smaller bands. How can that happen with more people in development - maybe making developer experience more joyful is the way to go. I'm not against specialization - but specialization can be done at a small community level too.