[threeseed]

The default write concern for the last 2 years has been majority.

And single node is a perfectly fine default for most use cases.

After all Cassandra's default consistency level is 1.

[dorlaor]

Most users of ScyllaDB/Cassandra use quorum or local_quorum

[threeseed]

And most users of MongoDB use majority write concern.

Hence my point there is no difference in defaults between MongoDB and Cassandra.