The criteria considered by the theorem concern how democratic a voting system is. I'd argue that 'democraticness' is secondary to two other criteria: accountab

The criteria considered by the theorem concern how democratic a voting system is. I'd argue that 'democraticness' is secondary to two other criteria: accountability and government-effectiveness. Accountability means that bad rulers can get voted out of office when enough people are displeased. Government-effectiveness means that the resulting government can practice good governance. When considering these criteria, I think plurality/first-past-the-post voting systems are superior. Unpopular leaders are voted out and elections usually result in single-party majorities that can govern effectively.