On that topic, I'll throw in a shoutout to Cormullion's excellent JuliaMono font [1,2]!
Typing certainly does add more friction between u and µ than a chalkboard would, though it is perhaps also notable that mathematicians seem to have felt that it's worth the effort, and have come up with a quite nice system for it in LaTeX -- and I would certainly not mind seeing more languages and editors add support for LaTeX completions the way the Julia ecosystem has.