I recently had a chat with Adam Frisby (Adam Zaius in SL) one of the founders of OpenSim who has since moved on to developing in Unity with projects such as ResLive. Does that mean other OpenSim developers should follow his lead, and give up on the open source version of Second Life? Not necessarily:
"There's room for both," argues Adam. "It depends on the level of interactivity required; but I do think there's more room for mass market growth in Unity." We then discussed the pros and cons of Unity versus OpenSim (somewhat ironically, via Facebook chat):