From my understanding of reading the Go driver code documentation and mongo docs client drivers should, by default, be set to use causal consistency:

I've noticed in the Go(lang) driver, when creating a new client or creating a new session, both read concern and write concern are set to empty, but CausalConsistency/Consistent is set to true by default.

According to the go driver docs:

New Client:

New Session:

The `session.ClientSession.Consistent` property by default is set to true.

So should the driver by default, be setting the "best practice" causal consistency preferences?

OR when calling `client.StartSession(options.Session().SetCausalConsistency(true))` should this be setting default majority read and write concerns?

Current implementation of `mongo/options/sessionoptions.go#ln51`

// SetCausalConsistency sets the value for the CausalConsistency field.
func (s *SessionOptions) SetCausalConsistency(b bool) *SessionOptions {
   s.CausalConsistency = &b
   return s
}

Suggested Implementation?

// SetCausalConsistency sets the value for the CausalConsistency field.
func (s *SessionOptions) SetCausalConsistency(b bool) *SessionOptions {
   s.CausalConsistency = &b
   s.DefaultReadConcern = readconcern.Majority()
   s.DefaultWriteConcern = writeconcern.New(writeconcern.WMajority())
   return s
}