https://github.com/containers/storage/blob/main/docs/containers-storage-zstd-chunked.md [9a5c0986a4a33feea7cc2d956928ed0149b32d9a]:
"zstd:chunked is a variant of the
application/vnd.oci.image.layer.v1.tar+zstd media type that uses zstd
skippable frames to include additional metadata (especially a "table of
contents") that includes the SHA-256 and offsets of individual chunks of
files. Additionally chunks are compressed separately. This allows a
client to dynamically fetch only content which it doesn't already have
using HTTP range requests."
This makes removing packages from base image actually reduce image size
(downloads will be smaller), but prevents sharing of layers, increasing space usage on registry.