I would assume “S3-like” in the sense that objects are immutable, large writes, separate metadata storage, etc. Patterns that fit modern SSDs better than the abstractions of block devices.
Yea, exactly, I was thinking the direction of for example how Ceph Seastore and WDs ZenFS bypass the traditional block device and vfs layers and do their own thing, combined with what nvme has been doing with these new extensions (kv, zns, fdp). Not really sure if "more s3-like" is completely accurate description of that direction, but to me it seems somewhat reasonable reference.
They don't really though. You can incrementally write an SSD. What you're proposing might be a useful abstraction for some applications but it's not closer to the metal, and it fits an HDD (especially SMR) or a tape even better than it fits an SSD.
