Partly down to the branding of the project, and the perceived added complexity which was not required, I just wanted a a simple extensible RPC mechanism, not a "Infinitely faster" "cerealization protocol" with "time travel" and "distributed objects". Cap'n proto is a lot to take in and wrap your head around.
Edit: I didn't "stop" with cap'n proto, I never started because the project rubbed me the wrong way :/ maybe I should have given it a go, but heh, I made a thing instead.
