So what is the Key Cask? The only difference is in the name, Keg and Cask both work the same way and serve the same beer you are quibbling over a name. Forget the past put away the rearview mirrors and get yourself up to date. It isn't hard to understand.Technology overcame the methods of the past 50 years ago, it's why camra formed. If you aren't following the methods of the past, then it's something different. Cellarmanship, venting, tapping, the ingress of air, the change in flavour, are all intrinsic to cask beer. If you aren't following the methods then it isn't and can not be cask beer, it's just beer. It's not hard to understand. Saying cask from keg, is like claiming Spotify is vinyl records from the Internet, sure it was the same recording in the studio, but the outcome and user is experience is totally different.