> Elixir and F# have |> but neither auto-traces.

Using dbg/2 [1]:

  # In dbg_pipes.exs
  __ENV__.file
  |> String.split("/", trim: true)
  |> List.last()
  |> File.exists?()
  |> dbg()

  [dbg_pipes.exs:5: (file)]
  __ENV__.file #=> "/home/myuser/dbg_pipes.exs"
  |> String.split("/", trim: true) #=> ["home", "myuser", "dbg_pipes.exs"]
  |> List.last() #=> "dbg_pipes.exs"
  |> File.exists?() #=> true

1. Debugging - dbg/2

https://hexdocs.pm/elixir/debugging.html#dbg-2

I should have bet more on Elixir. I did work in F# but MS really didn't seem serious enough about it, but the Elixer community keeps going strong.