We make internal hardware changes all the time to support component end-of-life, manufacturability, and other things. This is the norm in long-lifespan electronics. As far as user experience goes, though, today's SkyView displays have all the same capabilities of any that have ever shipped. So while the underlying hardware changes a bit, we endeavor to not have 400 models of our products which are all incompatible with each other. Everything. Just. Works. If you had SkyView display #1 connected to #10,000, they're just happily fly you where you're going. In fact, we've actually only ever had two platforms - the D10/D100 series and SkyView, and we think that's a good thing for customers.