Great writeup. I use a KV store for work, but only because the alternative for our data size (>1PB, >1 trillion keys), sharded sql, is totally awful. Distribute

Great writeup. I use a KV store for work, but only because the alternative for our data size (>1PB, >1 trillion keys), sharded sql, is totally awful. Distributed KV stores like foundationDB, dynamoDB actually do offer transactions , which is a huge win and I think their main selling point. I guess I'm like you - I really don't understand why someone who had another choice would opt in to a KV store (barring something like memcache, or something really high performance using an embedded KV store).