App Stores have a long feedback loop.

You look at the piece of software and decide if it would be useful for you.

You look at pre-made promotional images.

You try to imagine: "If I took the time to input my data into this, would it work for me?"

A long feedback loop with a lot of uncertainty, so there's a lot of dropoff.

Imagine instead that you look at a gallery of software, and all of it is running live on your data.

The feedback loop is orders of magnitude shorter.

Do you want to keep it, or not?

The quality is directly selected for.

Also, the predicted keeps are a useful quality signal to spread that quality for others.