I looked a bit, but the variety of libraries itself is somewhat concerning. There's this article https://wiki.haskell.org/Heterogenous_collections https://wiki.

I looked a bit, but the variety of libraries itself is somewhat concerning. There's this article https://wiki.haskell.org/Heterogenous_collections https://wiki.haskell.org/Heterogenous_collections that points to some good resources but the general feel I get from reading is that heterogeneous collections in Haskell are a bit of a rabbit hole with no clear answer yet.