Coping With Inconsistent Databases: "First, let me state the obvious again : eventually consistent databases almost never remain inconsistent long enough for users to notice and, even if they do notice, they usually don’t care — through the prevalence of cache-powered websites, our users are used to seeing stale data every so often and know to hit the refresh button to deal with it. Aside from a few critical edge cases like online payment processing, the problem with eventual consistency is not the user."