I agree that concurrent commitment would be problematic for any dual-master situation. AWS offers last-request-wins for replicating between 2 buckets, and assigning numeric priorities for replicating between more than 2 buckets. But AWS is solving a different problem, and their solution may very well fail for LakeFS replication.
However, a master-slave arrangement (one-way replication) would be extremely useful, and seems more technically feasible for LakeFS.
For some reason, I thought LakeFS Cloud would be capable of replicating (one-way or two-way) across regions. If practical, that could be quite useful. But it sounds like that was wishful thinking on my part?
(It's not for me to say what should and should not be technically feasible. Just clarifying the current capabilities.)