Universal support for third party integrations such as connecting with a database that allows for arbitrary precision decimals, communicating with other service

Universal support for third party integrations such as connecting with a database that allows for arbitrary precision decimals, communicating with other services without forcing a use of a random lib (because there are many that do this kind of thing). Support for this I believe is "low level enough" to ve implemented natively, it's not something like protobuf.