This function is used in many tests to determine if the storage engine supports majority read concern: https://github.com/mongodb/mongo/blob/4cc82e953bcfcb355cccf47ba5bb696e7aa7a057/jstests/multiVersion/libs/causal_consistency_helpers.js#L72-L80.

This starts replica set and then stops it, just to start a new one for the test. This is wasteful.