For my 2¢, it would be really great to see some "official" love for Haskell at GitLab :) E.g. having Haskell tools installed on shared runners would be pretty nice!
I'm also curious to know the state of functional programming at GitLab. I know you guys mostly do Ruby, but would you be open to employees using functional languages or frameworks for work? (e.g. Elm, Elixir, Haskell and other exciting functional stuff)