You're using a rather narrow/implementation specific definition of snapshot. I believe EBS snapshots are equivalent to you temp-snapshot, incremental/deduplica

You're using a rather narrow/implementation specific definition of snapshot. I believe EBS snapshots are equivalent to you temp-snapshot, incremental/deduplicated backup/delete temp snapshot combination. Logically it's still a snapshot, because it contains all data of the volume at a specific point in time, but the cloud provider abstracts away the details of how it achieves durability.