I actually agree, this is the most questionable piece. I prefer (and have argued for in JS) Hack-style pipes, where the value "placement" always has to be specified.

That allows arbitrary expressions on the RHS of the pipe, so for example this would be valid Gleam:

pub fn main() { io.println( "Hello" |> (_ <> " world") ) }

Gleam has curried functions by default so F# style pipes make sense imo.

Gleam doesn't have auto currying! Often folks find this (currying) a bit confusing to wrap their head around when learning functional programming and we don't feel like it really affords you much that couldn't already be achieved with just a little bit more work by the programmer.

Applicative builder APIs are the only thing we've found would be much much better if we had auto currying.

Ah my mistake. So this is a deviation from Elm?

I think you are confusing Gleam with Gren (a fork of Elm)?

Gleam did used to have this, but the community collectively decided that it was actually quite annoying in practice to always have to write `_, ` after every function