Agents don't seem like they should be in the standard library. The pipe operator should probably have some sugar for representing the first implicit argument to the function because it's weird to have things like Enum.map/2 become written as Enum.map/1 in that context. Protocols are bizarrely complex (you can do the same thing in Erlang with about 10% of the ceremony) and made weirder by the fact that structs are represented as maps with a special key instead of as records, so field access and key walking has an unnecessary amount of overhead comparatively. It doesn't feel "complete", because there are pretty big chunks of the underlying system that still make you extremely aware you're really running atop Erlang (debugging, tracing, profiling, etc.), up to and including the docs themselves which often just point you straight to the relevant Erlang documentation.
I like that it has brought a lot of new energy to the BEAM ecosystem. I like the tooling and focus on docs and testing that have come with it. I like the macro system, even though I think it's overused by the community and often to ill effect, but the system itself is much cleaner than Erlang's.
tl;dr... Sure, why not. :-)
