What can you not do in a monolith? You can still have async queues and different event processors that stop and start independently within a monolithic deployment.
What can you not do in a monolith? You can still have async queues and different event processors that stop and start independently within a monolithic deployment.
Speaking as a monolith fan, IMO/IME the main drawback is RAM usage per instance.
You can have a "big, beautiful" Rails monolith codebase used by both Puma and Sidekiq queues etc, and that works well from most standpoints. But RAM usage will be pretty high and limit horizontal scaling.