Right now I wouldn't even try putting a MikroTik switch on a critical environment. They are pretty cool (and cheap) for SOHO use but not for enterprise.
I would give it a try in non-HA environment as a switch where I don't need sophisticated features (so lab setup is ok), but I've never seen it under packet storm (they promised it now).
But yes, looks like they move in right directions with these 2PSU/2FAN devices (at least I can put them into rack), and... Well, let's hope! Even small offices may want to have some 10G infrastructure and some HA setup, too!