Different domains will have different requirements. Doing a monolith, doesn't preclude you from building domain specific services external to the monolith (Mode

Different domains will have different requirements. Doing a monolith, doesn't preclude you from building domain specific services external to the monolith (Model serving service for example). Take an RDBMS as an example, that is a service external to the monolith often written in a very different language to the monolith.