One minor point mentioned: I find it odd how many great PL designers I’ve known are hostile to learnings from other languages. Maybe because they field a ton of

One minor point mentioned: I find it odd how many great PL designers I’ve known are hostile to learnings from other languages. Maybe because they field a ton of naive “why can’t A do what B does”. But languages are similar in many respects, and there are a great many lessons to share across.