when you send a zap, the fun part, or essential part really (paying for jerkey) is the person noticing. what zap 1.0 hasn't solved is that, because it's both unreliable (i send private zap, most clients don't see it) lightning send, they don't see it or can't see who sent it. AND too public, (public tallys of all time zaps sent or received).
Once the initial coolness wore off, I think most bitcoiners prob looked at how it worked and said, cool microtransactions is all it's good for.