AWS DocumentDb not support mongodb 4.0

Question

I do not know why AWS DocumentDb does not support MongoDB version that above 3.6? Should I use mongo 3.6 or 4.0 above?

Answer 1

Amazon DocumentDB now supports MongoDB 4.0 compatibility including transactions: https://aws.amazon.com/about-aws/whats-new/2020/11/amazon-documentdb-with-mongodb-compatibility-adds-support-for-mongodb-4-and-transactions/