I've been using proportional fonts in emacs since many years ago, I can't remember how many. When I find code aligned with spaces to a horizontal position I keep it there. If I have to modify it I realign everything. Example
a = 1
ab = 2
abc = 3
becomes a = 1
change = 2
abc = 3
Nobody ever said a word about it.In Elixir projects we've been using the language code formatter for years and it forces a coding style like mine by default.