I switched to a proportional font by mistake when I started using acme as my primary editor. A few months later I realized what had happened and tested how things looked in fixed width. Turns out I like proportional better.
A big difference was probably the fact that the codebase I was editing used tabs for indenting and had non-ascii art indenting rules (basically just indent the next line).
Acme works very well with proportional fonts, although it doesn't do relative indentation well as a result (think lining function arguments up on the left paren). Still a really brilliant editor in many ways.
A big difference was probably the fact that the codebase I was editing used tabs for indenting and had non-ascii art indenting rules (basically just indent the next line).