I always longed for the existence of such an Ops-friendly DB, which - building on solid distributed systems concepts - could make easy and correct the hard things (consistency, geographical replication, effective possibility of zero downtime).

Now that I have a good candidate, I find myself wondering whether the performances would be good enough to ditch traditional DBs (I know: I should define "workload" before thinking about "performances"...)

I guess is the curse of tradeoffs: nothing in life is free.