The Flutter State Dilemma

Every Flutter developer eventually wrestles with state management granularity:

"How do I balance developer ergonomics against architectural rigor? When is a simple reactive primitive sufficient, and when do I truly need a structured, event-driven state container?"

For years, developers have swung between two frustrating extremes:

The Over-Engineering Trap: Creating multiple event classes, sealed hierarchies, and asynchronous stream plumbing just to toggle a boolean accordion or expand a card.