Big disks present a problem in the cloud provider environment: users typically want to partition them into smaller logical disks... but this means that larger disks must also have lower latency / higher bandwidth to service multiple users at the same time.
Most likely, cloud vendors have a large choice of sizes to try to match requested sizes of logical disks to physical disks, but if most users don't want / need disks that are this big (or bigger), then the provider will have a problem.
Big disks have their place; both as selling "large bulk storage" to cloud users (most cloud systems use SSD as the "main/OS" drive now anyway) but also as near line backup storage.
Most likely, cloud vendors have a large choice of sizes to try to match requested sizes of logical disks to physical disks, but if most users don't want / need disks that are this big (or bigger), then the provider will have a problem.