It's already established that, for clients, onion-pi's are discouraged---onion-pi wifi doesn't protect enough (I.e., at all) from browser-based attacks.
Given that, The question is now, "Are onion-pi's are good enough to be useful relays?" Roger said no. Is there a more informed opinion on this matter---particularly from someone who has actually tried this? Are there any relays that are known to run on onion-pi?
If an onion-pi is insufficient for a useful Tor relay, what is the limiting reagent? What more does it need to be useful?
-V