[talhah]

Does anyone here actually use SML for production or know of big projects (outside of academia) which uses it?

Compared to other functional langauges, it doesn't seem as popular.

[rabbits77]

Anecdotally, most people use SML as part of academic projects and when they do to use it for commercial projects end up going to Ocaml or Haskell. That is because of the wider ecosystem of projects to support practical things like talking to databases, networking, etc. Also larger communities for documentation and help debugging issues that only come up once you start scaling out.

[jstrieb]

I've used it for a handful of personal CLI applications. Not sure if that counts as "production," though.