Spelt wrote: I also wonder however, if all the work of keeping beer lines clean and scrubbing out kegs isn't just as tedious.
Cleaning beer lines: Unscrew tap handle and disconnect tap. Fill squeeze bottle with Beer Line Cleaner solution. Run through into bucket. Rinse.
Cleaning kegs: Fill with 2-3 gal. hot PBW solution. Swirl vigorously and sponge down. Disconnect poppets and clean. Rinse and reconnect.
When ready to fill kegs: Add 1-2gal. StarSan solution. Swirl vigorously. Disconnect poppets and drop in. After 3 min., empty StarSan solution into bucket for reuse with other items.
It's still cleaning, and not usually my preferred aspect of brewing, but I could have 5 kegs cleaned and sanitized and ready to fill in about an hour. Then, filling them would only take as long as it takes to rack 5 gal. from each carboy to each keg. If you can't clean, sanitize and bottle 20 cases of 12oz bottles that fast, then I think you have your answer.