• Is it some kind of historical elective course

      No, there was a poster showing correspondence with Latin on the wall, somewhere. The symbols are almost 1-1 with modern orthography, so it takes only about a week of practice. And I was really bored.

      never seen Glagolic in the wild

      It’s about as distant from modern use as runes are for germanic speakers, but maybe with different connotations. Decorative nonsense.

      But I did submit essays written with that when I wanted to fail with style. :)

      I also met a guy in college who used it to keep notes. That guy was also bored.