[n0nick]

> You read code when you're programming. The only difference is the mix of characters you'll see near each other. General readability matters -- when is it OK for a regular font to be unclear about which character (a zero or 'O') you're looking at?

The difference in mix of characters reflects on the design decisions made for the font type. Target use is important. Some types are great for titles, some for text bodies, some for logos. It makes sense to me that code is another category.

Yes, readability is important, but it's not binary. The level and aspects of readability required for a novel body are not the same as for an article title.

Differentiating between zero 0 and uppercase O is critical for code (and work terminals, and perhaps data tables), but IMHO isn't interesting when designing for text bodies. Same goes for 'rn' and other issues that have ever annoyed only programmers.