Architecture decisions are easy - until you have to live with them. In Black Miro, we turn system design into a live, Black Mirror–style experiment: the audience collectively builds an architecture in real time, voting at each fork in the road (monolith or microservices, managed or self-hosted, async or sync, abstraction or control). Whatever the audience chooses, we follow that path and reveal its consequences. the good, the bad, and the “how did we get here?”. Each run creates a different system, a different failure mode, and a different lesson. This is not a talk about best practices. It’s about tradeoffs, guilt, and the moment you realize the architecture is no longer yours - it’s what you voted for.