I like this:
“…an appreciation for the craft of programming that is exceedingly rare in the wider world of programmers…”
I think there is a spectrum from coders, programmers, … to actual software designers. The later knowing a range of paradigms and approaches which Haskell introduces to others in the imperative bubble. Bit by bit other languages, created by knowledgeable experts who know the domain are incorporating similar things - even Java’s streams with the triad of filter, map, reduce.
Nowhere as simple and clean as in Haskell, but echoing similar ideas. Qwerty v.s. Dvorak.
IMHO Haskell has a multi-tiered learning and usage curve, initially clean and simple, and then as many new language pragmas, it branches out into a tree of DSLs. The ability to define new operators and monadic operations is also powerful, but can lead to very localized code structure and usage.
Even if there is no big company X using Haskell, there is much to learn from it to anyone who programs.