Rails Upgrade Notes

Good advice from Arkency:

Go for tactical DDD patterns for your core domain. Modularize your code, extract Bounded Contexts. Use Rails where they shine: ApplicationController, ActiveRecord used for writes and reads without the callback hell and STI. We’ve shown you the alternative approach many times: commands, service objects, process managers, etc. Believe us, your next upgrade will be just a matter of Rails version bump in your Gemfile.