Manual Reference vs DBRef

What is the benefit of using DBRef rather than manual references? it looks like apart from some drivers loading the DBRefs automatically via additional queries and (maybe special cases of horizantal partitionning) there is no other obvious benefit. Could you please clarify this as I have not been able to find clear resources on the MongoDB webiste. Thank you.

@log_blackhole,

There is no real benefit in using DBRefs, as they are not supported on the server side, neither do the drivers have much support for them.

For more information, have a look at this documentation page:
https://docs.mongodb.com/manual/reference/database-references/

Regards,
MongoDB University.