[ossopite]

> The only real advantage that a proportional font has is that you can squeeze more text into a particular space and as a result you can read faster

I would disagree with that - I find it easier, more comfortable rather than just faster to read any text in a proportional font because the spacing of characters is, well, proportional to what the form of each letter requires. I think it makes it easier to recognise words. It's true that code has a lot of unusual combinations of characters but still it is mostly ordinary words. A proportional font that makes those unusual combinations of punctutation characters less clear is certainly bad, but there are proportional fonts that don't.