This driver is not working with MongoDB 5.1/6.0 due to a change of the Wire Protocol

[synopse]

Support of regular/legacy opcodes have been removed since 5.1/6.0. So we can't connect to any new version of MongoDB with this driver. https://www.mongodb.com/docs/v6.0/reference/mongodb-wire-protocol/#opcodes

OP_MSG needs to be used for all communication, and will replace all other OP_* opcodes with commands, like find insert etc... So it needs a deep rewrite of the code.