[rdtsc]

> First, FDB is clearly designed for “read often, update rarely” workloads, in a relative sense. It produces multiple consistent replicas which are consistently queryable at a past time stamp

For reading it has a 5 second snapshot timeout that gets in the way. One can stitch multiple transactions together but that could mean losing snapshot isolation without further tricks.

In other words, even just for read-mostly workloads it has a few warts.