A car fueled by potatoes could work as well but you don't see me cruising around in one do you?
I love it.
Riddle me this guys n' gals;
Why is it you want an MMO? seriously, I don't get it.
The main draw to the ME world is story.
You think mmo concepts, which are designed to keep players playing, so the companies make money of your subscriptions would really feel like ME?
Think about that.
Like so what, you can make a Krogan, or a Quarian, or whatever.
Aside that, what is the draw?
You want this because ME1/2 are awesome, I understand that. But an MMO would need to bring in a whole bunch of stuff that is not part of what makes ME great.
I don't want to say don't hope for it, or something, hope for it if you really want it, but I don't think you can encapsulate what makes ME great with an MMO.
Like if your just some random race in a group like the alliance, or flotilla etc, who cares about that? Right now your Shepard. The galactic equivalent of Bruce Willis. You kick ass. You're the best of the best. You're taking on stuff that has wiped out races for millions of years, and your going to win.
No MMO character you could get would ever compete with Shepard, and Shepard and his/her story IS Mass Effect.