Honestly, no. And I do plan on continuing to play 3e.
It sounds interesting, but one of the reasons I want to stick with 3e is because I have a large inter-operable body of work with which to build my world with. It sounds as if a 20 level spell system, though I see the benefit, would be more disruption trying to integrate than it would be worth to actually implement. So it would be merely a curiosity, and when it comes to my purchasing priorities, things that I know I would never use rank pretty low.