As native speakers of a language that uses Cyrillic, it was a little easier for my peers and me to learn Greek letters for the math classes, since most of them come for free to people who know both Latin and Cyrillic.

But when the probability theory class started, everyone found themselves in one of two groups: those who could reliably draw "ξ", or those who instead drew some random snaky thing which probably does not even have a proper Unicode representation. I spent half an hour finally memorizing how the damn thing is actually written to move myself from the latter group to the former.

Yeah, they should mark the Greek alphabet as a mandatory prerequisite for college math. It had an unreasonable effect on how quickly I was processing notation-heavy math after learning some Greek for going on a trip over there.