Lifting "banana" foils might be acceptable to most of us tough, and I think we will see them in common use soon.
And isn't this premise to increase speed by reducing the wetted surface of the leeward hull? And not fly it, which could result in nastier pitchpoles?
But not everybody will think a foiling cat is still a cat, and do we really want to go in that direction?
Which is why I posted the only foiling cat I could find. Not what I had in mind. The beach wheels and anti-pitch tabs are cool, eh? You're right Dan, it can only get better.