Would Haskell or Elm count as non-mainstream? I've used both professionally and loved them both. They're both pure functional languages. I love how expressive y

Would Haskell or Elm count as non-mainstream? I've used both professionally and loved them both. They're both pure functional languages. I love how expressive yet terse both of them are, and I love functional languages. Before I started using those languages I had no idea what functional programming is so they both totally changed my thinking to be primarily functional. The official Elm guide is quite good, and there are a lot of good resources out there for Elm because it tries really hard to be beginner-friendly. Haskell on the other hand... not so much. I guess the best resource I used was Learn You a Haskell.