<i>I now regret not taking calculus, but it&#x27;s so much easier to learn something these days.</i><p>It&#x27;s funny to hear you say that.  I don&#x27;t know how old you are, but lately I&#x27;ve been trying to teach myself some additional math that I never took before (like Linear Algebra) and refreshing on Calculus, and now - at the ripe old age of 42 - I swear I find it easier to learn this stuff than I did when I was in college 20 some odd years ago.<p>Maybe it&#x27;s just a question of motivation, or maybe I have more context available now, or, hell, maybe I&#x27;ve gotten smarter...  but whatever it is, I&#x27;m not going to complain, considering how you always hear about how our minds slow down as we age and things are supposed to get harder to learn.