The new Prefab workflows, which are available in Unity 2018.3, allow you to split up Prefabs on a granular level. This gives you greater flexibility, increases your productivity and enables you to work confidently without worrying about making time-consuming errors.

The improvements are based on surveys with more than 150 enterprise customers, numerous interviews, several usability tests and two game jams. The long-term goal has been not only to implement support for nesting, but to rethink the core Prefab workflows so different team members can simultaneously edit Prefabs confidently and efficiently.