Perhaps it's because I've been listening to KARTAS for so long. Or perhaps it's because Robin Laws is a clever cookie. Either way, I'm taking up some vocabulary from him and swapping it as part of the Great Leap Forward that our hobby is in the middle of.
There shall no longer be the NPC, there will be the GMC.
He mentioned GMC in passing and didn't explain it. The context was enough for me to get it. I might be well behind the curve in adopting the term but I'm definitely an enthusiastic supporter.