Please point us to references of the solid roof leaking. How is that even possible? I assume you're referring to the all-glass roof and not the metal body-colored roof? The only way I see the all-glass roof leaking is if it was cracked. I suppose it could leak around the edges but that would be possible for the panoramic roof too, in addition to the known leaky issues of the sunroof.
Water leak in 2013 Model S with no roof
Oops, OK, technically it is from the seal in the rear. And reading through the thread it happens on pano roofs as well. It has been a while since I read it and I guess I just remembered solid roof leak. My bad