I have the feeling that as I get older, I have less energy and pure grit to power through things, but I'm also better at focusing what actually matters and being more systematic in my progress. The positives outweigh the negatives, and I wish I could impose how my brain works now on my younger self.

I recently went back to university, and they tend to have exams that favor the young: lots of memorization and much more questions than there is time to answer. So I probably would have done academically better with my younger brain, however, I feel like I understand the material and the context much better than I would have before.