[im_down_w_otp]

Quorum and CRDTs deal with completely different problems.

CRDTs do one thing... they mitigate the issue of "lost updates". All acknowledged writes will be represented in the results of a query and no "winner" strategy is involved that would cause some acknowledged writes to be possibly incorrectly dominated by others and thus lost.

Quorum (strict) just provides a very, very, very weak form of consistency in the case of concurrent readers/writers (RYW) and just very, very weak consistency in the case of serialized readers/writers (RR).

My personal opinion is that any eventually consistent distributed database that doesn't have built-in CRDTs, or the necessary facilities to build application-level CRDTs, is a fundamentally dangerous and broken database because unless all you ever write to it is immutable or idempotent data, you're going to have your database silently dropping data during operation.