The end result is superficially different. That's the point - we like the flow of the end result! But the implementation is completely different, as it's pure

The end result is superficially different. That's the point - we like the flow of the end result! But the implementation is completely different, as it's pure functional compared to object oriented. "string".do_stuff() - do_stuff() is a method on the "string" class, with all of the potential gotchas that might come with an OO implementation. Does the method mutate the internal state of the object? Does the particular class override the default implementation? Is it a monkey-patched implementation (the issue raised by this article)? "string" |> do_stuff() - do_stuff() is a standalone pure function. The data is immutable and does exactly what it says.