On: Programming Fonts – Test Drive

[superobserver]

I actually find the coin-style zero superior, like that shown in Hack font, as it avoids ambiguity with the Ø symbol.

[hnarn → superobserver]

I don't mind it, using an image for zero that is exclusive is of course preferable. But seeing how common the "slashed zero" is, I think the least we can do is avoid making it more confusing than it already is.