We tried a couple of weeks back, but then most dependencies have not been upgraded yet. The problem is that, to my knowledge, there is no riak_core for Erlang 20.
I suggest that you build on top of the Riak Core from Heinz Gies. That's what we are using in some of our new projects.
This is what we actually do.
I checked a couple of weeks ago with Heinz, but there wasn't a version available (but maybe I misunderstood him...).
Can you point me to an Erlang 20 compatible version?
Ah, we might be pulling a branch for our Riak Core work. I can look into it tomorrow and get back to you.