That assumes that the OS didn't crash. It also assumes that the data isn't valuable, in which case why not just use faster, cheaper ram? There are workarounds,

That assumes that the OS didn't crash. It also assumes that the data isn't valuable, in which case why not just use faster, cheaper ram? There are workarounds, like adding a layer of faster, cheaper ram, but then this starts to look like a big perf improvement in a rather traditional system.