Are they taking requests? I know just enough CSS to hang myself, but one thing I can never keep straight in flexbox is "align" vs "justify". Could not have used something like "main-axis" or "cross-axis"? Intentionally had to be somewhat obtuse from how it would be used?

Yea align and justify get me everytime.

I like that in Flutter they do exactly as you suggest: they call it mainAxisAlignment and crossAxisAlignment