That’s actually fairly standard naming in networking, like cat5 cables, cat5e is cat5 but after fixing a few bugs in the standard. Cat6 came out later and super

That’s actually fairly standard naming in networking, like cat5 cables, cat5e is cat5 but after fixing a few bugs in the standard. Cat6 came out later and supersedes cat5 and cat5e. Think of it like 6.1 instead of 6E. Minor revision to the existing standard.