I’m aware of the trade-offs. :) I’d rather use a digraph operator for mutating assignment, again with the Huffman coding argument. One design I’m thinking of is using “@” as the mutable qualifier (e.g. “@int” is a mutable int), and correspondingly use “@=” for mutating assignment. (The swirl in the “@” glyph is meant to allude to mutation, and it’s a character that visually stands out in code, as mutation should.)