Come to think of it you could take the arguments made here and replace Haskell with Perl, and then also replace Rust with Haskell and it would still make more sense.
I worked with a perl backend for years. The frame work was very good but perl was horrible. I hate the syntax and really hate having to reference and dereference. It is not that hard to do but it's just so annoying.
Perl was mainstream and exists in many corners. Haskell was never mainstream.