We should not have had to hold a discussion on this. Nobody is being forced at gunpoint to acquire or use rollback powers. If it weren't for the abject timidity of the developers, my guess is that we would have uncontroversially had rollback for all registered users since 2005.
Far from being rushed through in a six-day debate as Doc appears to believe, the discussion on this practical and sensible extension of software functionality has dragged on needlessly for years, as perfect an example of instruction creep as it would be possible to ask for.