Anything more expensive available for civilians is generally thermal or night vision, it's easy to spend $6k-8k on a scope with half the zoom but thermal 640x384 sensor capabilities.

People use $4000-9000 thermal scopes at much less zoom and much shorter ranges under 400 yards shooting feral hogs in Texas.

They aren't quite at the top-end price of traditional scopes. Hensoldt makes scopes that go for almost $8k.

They aren't aiming for a 4-6 inch target though (I seriously doubt you could even see that with 35x at 4.5 miles). They are aiming for the center of a target 7.5 feet by 10 feet.

The difference between that 8k scope and this 4k scope is mostly a tiny bit of clarity and last 2-3% of fit and finish. Neither of these would affect scope accuracy and the clarity wouldn't exist at that range anyway due to particles in the air. No purpose in special ordering one and blowing 4k that could be spent elsewhere on something that won't impact the actual shot.

given that this devices was successfully used for such a long distance shot and chosen by people capable of that type of a feat it is questionable for someone else to say that there's something "better". with regard to aiming on long distance - how can there something be better? maybe you meant to state that you own models which are better suited for your specific use case.

Looks like a Charlie TARAC from the youtube comments - https://tacomhq.com/charlie-tarac/