The long PR is likely implemented thanks to lower tension needed from the mainspring through the train. The only way to do that (besides lowering the frequency which they've also done) is to reduce the force needed to flip the escapement, and the easiest way to do that is to make things lighter. Unfortunately lighter usually means weaker... replacing metal parts and jewels with synthetic materials that require less force to move but are more susceptible to damage over time.
I'd rather have an old fashioned ETA that beats at 4Hz, uses a real jeweled escapement, I can regulate myself, and pretty much any watchmaker can work on forever. But that's just me.[/QUOTE]
This lines up with the opinion of said watchmaker. I agree, there are things about the movement that don't appeal to me. I'd prefer a workhorse movement that could easily be serviced by many