Stateless Parts, Stateful Wholes

Everyone says “stateless services scale better.” True. But we still need systems that can remember.

In modern architecture, the mantra is clear: make your services stateless. Stateless services are easier to test, retry, and revert. They scale horizontally and avoid messy side-effects. But when you compose a system entirely of stateless parts, you still need *somewhere* to remember what just happened, what's in progress, and what's next.

That memory of…