[dredmorbius]

I like flipping questions such as this around. The topic question suggests two alternatives:

1. What (recently or distantly) acquired skill(s) have proven most useful to you?

2. What skills don't you have but you regret or year for most?

I like @bckr's guidance (<https://news.ycombinator.com/item?id=34055079>), and suggest that there are abilities with greater persistence which are often underappreciated.