Some languages have also seen great success with having a standard platform but still allowing users to replace it as needed. The many Haskell Preludes and Jane

Some languages have also seen great success with having a standard platform but still allowing users to replace it as needed. The many Haskell Preludes and Jane Street's ocaml core are two such examples. I think the ability to opt out of the rust-platform metapackage is a great feature.