Considering some project I'm able to accomplish today by hand, it is much larger than it was 25 years ago, but back then it would have mostly been inherent difficulty and now the work is mostly accidental difficulty. The libraries available have solved almost all of the inherent difficulty for many small (solo-dev) projects, and so for many small projects I already know every I need to know to do it (even though I don't know everything I would have needed to do it 25 years ago.) All that's left is doing it.