I'm rewatching SG-1, and in epsiode 5x22 Revelations, it is explained that the Asgardians are all clones and that it causes degradation. Carter explains it like "making a copy of a copy of a copy". That I just don't get. Why don't they just make a "savepoint" of body which is working fine and don't just clone/replicate that specific body, there is no reason to clone new body from the old one, is it?
From later episodes we know Asgard have replication system capable of making anything, so why not just make a "snapshot" of a body and just use it instead of cloning? Would solve their problems, but would buy them as much time as they would need.
Am I missing something or does this just fall into the "they needed a plot" category?