The problem is that these rules should apply in sequence to a given feature or flow, but they're instead applied in sequence to the whole product. So what happe

The problem is that these rules should apply in sequence to a given feature or flow, but they're instead applied in sequence to the whole product. So what happens is: they make everything "work", then they spend the next two decades pecking at making it right, and making it fast takes a back seat. Corollary: interaction latency, power consumption, and other performance characteristics should probably be part of "make it right", and "make it fast" might not even be a value at all.