Where is this one dev team that is dealing with concurrency? I don't see how you do this? At least not with the current state of the art in concurrency technology. They can provide some basic tools like concurrent collections, but the hard work is still app-dependent. I still need to figure out where concurrency makes sense. I still need to figure out when data races are OK and which ones are a problem. I still need to be the one to put locks in my code. It's not like I can just push up the source code to Photoshop and say, "Make it concurrent now please".