At least that's what word on the street says. Actually, it's only what I've heard from these two -->
We can't just let this hang in the wind. We need an official stance on what the abbreviation now stands for. So either take a poll by letting the community decide or the MAME Devs should come to an official agreement of what the abbreviation stands for now. Anything less would be uncivilized https://youtu.be/RCwzdzA-01Q?t=27s