Referring to these as "rules" when they aren't is exactly what great-grandparent was warning against: > […] will always end up being dogmatized and multiplying

Referring to these as "rules" when they aren't is exactly what great-grandparent was warning against: > […] will always end up being dogmatized and multiplying complexity needlessly. If more than one process helps you get your job done, great. If it's all one self-contained application, go for it. You start feeling the pain when you have unrelated or loosely-coupled applications in the same container.