This is a great visualisation. What's frustrating, and what few font designers seem to realise, is that it's not enough for two letters to be distinguishable i

This is a great visualisation. What's frustrating, and what few font designers seem to realise, is that it's not enough for two letters to be distinguishable if they're next to each other; I need to be able to glance at a lowercase L and know immediately that it isn't the number 1, even if there are no other l's or 1's in view. Many of these fonts have a very distinct lowercase L but the number 1 could go either way. Others have a distinctive number 1 but if you saw a variable named l you'd be momentarily confused.