It’s not possible to read a new value at quorum and to then later read the old value at quorum in Cassandra. This is enforced by “read repair” that ensures the

It’s not possible to read a new value at quorum and to then later read the old value at quorum in Cassandra. This is enforced by “read repair” that ensures the quorum agrees on the reply, by propagating the newer values if they are missing on any of the quorum, before replying. That’s not to say failures in distributed systems aren’t messy; they definitely are.