I can appreciate that but there are several oils that have esters+pao.
It's not just Esters and PAO, it's Ester/AN/PAO or Ester/AN/G3 depending on the product family and that specific combination was chosen because it provides high solvency, while reducing the tendency for surface competition by using a lower ester dose, since esters are quite polar and will fight for surface space with the AW additives.
As was noted by
@BMWTurboDzl, there are many families of esters and not all of them are good at cleaning, and that may not be the intention of the blender (cleaning) instead focusing on oxidative stability or some other metric that leads them to choose a different ester.
But again, it's not just about the base oil blend, that was just one aspect touched-on in my post, it's also about absolutely no compromises made on other aspects of the product, such as AW performance, because profit isn't the motive here, these products are blended because Dave decided to produce something for the consumer space and let Dr. Rudnick have some fun, working without constraints, the main focus of the business is racing, industrial applications and large fleets, for which some of these products were blended. There are no "sales" guys to pay or distribution network to manage, it's a specialized business that focuses on producing top-performing products for the industries I mentioned and whose owner decided to have some fun making some of these products, plus some bespoke offerings, available through the website. He's an enthusiast, like many members on here, so he joined this forum and engaged with us and, based on those interactions, that's how some of the products they offer were developed. He also opened up his factory to us and many members got a full site tour of the operation, which was a pretty amazing gesture on his part.
As I said, these products may not be everybody's cup of tea. The price can be hard to justify for a DD, and that's fine. But if you are looking for the absolute best in wear performance while also actively cleaning, I'm not aware of another product equally capable.