[euroderf]

Yes, writing function chains that compose from left to right, combined with the error checking convention, is a no-starter. So maybe you embed an error, and then check for error non-nil everywhere ? Or does KISS imply that you just panic and recover ? Some intensive googling finds that there's been many attempts to design an easy to use, easy to understand pipelining convention, but I have not found any one of them to be convincing.