To be fair, the solution here would be for the kernel devs to ask the "SCSI council" (or whoever picks the ATA opcodes these days) and the NVMe sig to create a

To be fair, the solution here would be for the kernel devs to ask the "SCSI council" (or whoever picks the ATA opcodes these days) and the NVMe sig to create a mechanism by which the device can communicate its durability guarantees, if any. If they decline to create one then the kernel devs can just declare one (even if nobody implements it). Failure to implement the API is, of course, equivalent to reporting "no guarantee" for all queries. Then they could at least say "we're doing everything we can; next time you buy a storage device look for feature X".