It’d be really nice if results in the right sidebar were aligned using a decimal tab stop, rather than just left-aligned.
Not sure how tricky implementation would be, but this would make place values line up (if the user is using a font with tabular figures), which I find super helpful.
(While I’m here, I’ll just voice again that I think tabular figures are a more sensible default than proportional figures—even if not for the editor, definitely for the results sidebar.)