I tend to agree with this, thats why theres canonical URIs for atproto posts that are agnostic to the hosting provider. The format is at://DID/collection/recordKey.
These are used throughout the system, for example if you look at the output of a feed generator, its just a list of these URIs
These are used throughout the system, for example if you look at the output of a feed generator, its just a list of these URIs