This is really interesting and another dimension to cloud. The fact is, even very expensive cloud instances are _slow_. They suffer from noisy neighbours badly,

This is really interesting and another dimension to cloud. The fact is, even very expensive cloud instances are _slow_. They suffer from noisy neighbours badly, and also IO performance is generally really poor compared to on machine PCIe4.0 NVMe drives, which is probably the key performance block on many workloads.