This captures the essence of mid 20s vs. 40 year old entrepreneur. > My brain was quicker at 21, memory was slightly stronger (slightly faster, easier recall),

This captures the essence of mid 20s vs. 40 year old entrepreneur. > My brain was quicker at 21, memory was slightly stronger (slightly faster, easier recall), and I had greater endurance at working productively in very long stretches. > I'm a dramatically better entrepreneur across the board. My patience has improved quite a bit, and my understanding of how to build for simplicity, reducing things down to only what they need to be, is leaps beyond what it was in my 20s. > The single most important improvement I've seen, is building up a belligerent ruthlessness when it comes to complexity and general bloat. My 21 year old self just loved to build unnecessary, complex shit.