I have no doubt the new grey will look GREAT on the car. I'm sure I would have given it very strong consideration were it available alongside the old grey (that I eventually chose). However, a couple thoughts that-- perhaps-- might also resonate with my fellow classic grey owners:
-The old grey is much farther off black and will continue to hide dirt well (I've had my car 2 months... only washed it once... looks great!)
-New grey will show scratches and swirls marks more easily (as all darker colors do)
-The new grey basically looks like the old grey... at night.
-The old grey changes color with light from blue to green to grey. Admittedly, it'll sometimes look less "glamorous" than the new grey in some conditions, but it'll look better in many. The CNet pics from this week capture it's blueness well:
Tesla Model S, in Performance Plus trim, drives like a rocket on electric rails - CNET
-The new grey does NOT seem to match the color tone of the grey wheels very well at all. Not the same palette...the wheels are browner?
-If you're using/buying the grey TSportline TST 19" (Turbine clones), they are a shade lighter than the 21" grey Tesla Turbines. On an old grey car they are still darker than the paint, but a new grey car I think you'll end up with wheels lighter than the paint. Maybe a less desirable look? Though, admittedly, on a black MS the grey wheels (also lighter) look spectacular. I think the color tone of the TSTs are better suited to the new grey than the Tesla grey wheels.
Anyway. Just my thoughts. Another manifesto length post guaranteed to kill the thread. <sigh>
Oh- I almost forgot. Final reason:
Normally I'd have chosen blue when ordering but I was scared off the blue because it was so dark and I knew it would show marks and age prematurely as it got battered around town. Silver would have been choice number 2 but for the chrome strip under the doors that makes them look misfit on silver cars (and I already have a silver car). So I chose grey. While the NEW grey might have replaced blue in that series of choices/selections-- it would have been ruled out for the same reasons the blue was DESPITE how great both those colors look, and I'm man enough to acknowledge they LOOK better... when new.