How to switch to mongo

[emcodem]

Thanks for the magnificent project.
I had the need meanwhile in 2 projects to switch to mongodb for speed and size reasons but i needed to rewrite all queries.
The reasons are various but mostly that i believe callbacks are gone from the original mongo driver and it does not seem to support exec().
Is it still possible to switch to some mongodb driver easily? Which was a mongo npm version that worked?

Thanks a lot!