Scylla has "tunable" consistency[1][2][3], so it's possible to get consistency without too much of a performance hit, and still be resilient to some failures.
On top of this, ScyllaDB also has "Lightweight Transactions" (LWT) that use Paxos to do a compare-and-set (CAS) read-before-write. This is important for strict linearizability. You can think of it really roughly as "single partition ACID."
They are also implementing a Raft infrastructure upon which they will be able to do strong consistency transactions in the future.
They are also implementing a Raft infrastructure upon which they will be able to do strong consistency transactions in the future.
https://www.scylladb.com/tech-talk/the-future-of-consensus-i...
[Disclosure: I used to work at ScyllaDB]