I don't think you can reliably phrase this in terms of Moore's law. Moore's law mostly concerns raw FLOPs. It's less useful for predicting hardware performance

I don't think you can reliably phrase this in terms of Moore's law. Moore's law mostly concerns raw FLOPs. It's less useful for predicting hardware performance for operations that are governed by limitations like I/O and memory latency. And this slowdown, if I understand it correctly, is largely driven by memory latency.