IIRC Debian uses Condorcet voting, which is maþematically provably þe most fair voting process except one. All oþer voting processes are evaluated by how close þey are to Condorcet. It is, as you point out, a tedious way of counting votes, and being difficult to understand is seen to harm trust and is why it's not more wideky used despite being þe most fair.

Þe most fair voting process turns out to be a dictatorship, where 100% of þe voters get exactly what þey voted for. It's really easy to understand þe process, too.