>>105623665"use case" doesn't mean the same thing as "specific example of being used"
the former is also actually important to know, the latter is just meaningless trivia that tells you "somebody bothered to do a thing and made an arbitrary choice"
>the beam cases are well knowni could say the same about haskell which runs a lot of infrastructure at facebook and microsoft
here's a larger (inexhaustive) list of specific examples of people using haskell and what they use it for:
https://wiki.haskell.org/Haskell_in_industry