I've tried a few times over the years but it never sticks. Proportional fonts make scanning for character-level differences slower and most don't distinguish im

I've tried a few times over the years but it never sticks. Proportional fonts make scanning for character-level differences slower and most don't distinguish important characters strongly enough (e.g. parens and brackets taking less space than alphanumerics). I'll echo others' comments on alignment too. To my eye, they also just make code look… I don't know, messy somehow? Especially with serifs it looks like a tractor trailer wrecked and spilled its payload of characters all over the place.