When to use x-objects?

So I wrote a few short articles on when to use FormObjects and Jobs and ServiceObjects. The question is of course “it depends”, but the leading principle I have is keep it simple. That being said, for inspiration, some suggestion for different layers to manage the application complexity from Vladimir Dementyev’s talk on Railsconf:

Presentation

• Controllers (standard Rails)
• Channels (standard Rails)
• Views (standard Rails)
• Presenters
• Form Objects
• Filter Objects

Application

• Authorization Policies
• Jobs (standard Rails)
• Event listeners
• Interactors
• Deliveries
• Notifiers
• Mailers (standard Rails)
• (Service objects) (he considers these as a bucket of objects waiting for the right abstraction)

Domain

• Query objects
• Models (standard Rails)
• Configuration objects (somewhat standard Rails)
• Value objects
• Decorators

Infrastructure

• API Clients
• Adapters (DB, Mail)