Thats a lazy motto. Air sounds NOTHING like Love. So the play on the original phrase doesn’t track.

Now, if a bakery were to have a sign in their window that said “All you need is loaf. Fresh bread loafs baked daily” THAT actually works.

I mean, “All you need is air” is just as lazy as when I saw a bar sign that said “All you need is beer”. It just doesn’t play. You could fill that last word with ANY noun and it’s equally meaningless. It has to sound similar to love, AND make sense as a pun for that to work.

Torille