Guys I think you moved away from the thread's topic.
The topic is about "combined build" (so it cannot even mean the source, as the source is already more or less one).
Also I think with 10-20 users participating in the thread, a vote would be stupid. Hell even if all EmuChat voted, it wouldn't mean anything. AFAIK thousands use MAME (and maybe 1/10th of them also use MESS - also I hope 1/2 of them KNOW MESS at least).
As a member of the team (?) pointed out, there are some practical issues for this to become reality yet ...that honestly I don't see and I asked more "educated in the subject" people and weirdly enough agree with me, but anyway, the thing is, the devs are the devs and until someone that is a MAME team dev steps up and says "I will handle the unified build and produce it for all major updates", then for us is not much to do. Yelling doesn't help either (I usually tend to be pretty vocal).
I am that close to make a bet that we will start having an official unified build within the next six months, but knowing that there are people that actually push against it (for reasons I am not sure are valid), I will not make that bet.
I'd love more expert opinion from "my" side (I know and you know that at least one voice is not interested to be heard here), but in any case I've done what I can.
(which is not much)