But what about the good days when you need all that power you normally have. Most sails have reef points to tie the excess sail into the boom, what about replacing the main halyard with D12 or such and loop it around the mast base block and back up to the boom gooseneck, tie it off to lower the sail to what ever the reefing patches you have had sown into the old main. Even roll it around the boom AKA Farrier style but don't go cutting good sail area off.
Never done it but often thought about it.