True, but for myself (since I posed that question for my own evil purposes
) I wouldn't go through the cask fast enough (I'm going to have 7 faucets to choose from!) before the stuff went undrinkable. I believe I read somewhere that CAMRA does not necessarily oppose putting down a CO2 blanket over the beer for preservation, just that it can't force carb, or dispense it, so I would still be serving 'real ale', just a little longer lasting. Granted, I wouldn't get the changing oxidization level as time went on, but hey, can't have everything!