@tomminieminen Alas, a good font doesn't always help. When eyes are tired, or eyesight is otherwise impeded by, say, being hungry, i and l look the same in nearly all the fonts.
Also, I can't control the fonts used by people who read my code.
It's so easy to avoid this problem that there's no point in not doing that.
@liw @tomminieminen I use #JetBrainsMono, which appears to also be available in #Debian.
https://www.jetbrains.com/lp/mono/
I used it since I found out that's the font used on @JF's #InfiniTime firmware for the #PineTime, which I found pleasant to read even on the small watch.