Not my first fisheye, so I think it will continue getting considerable use. The reason, is that I am not using it to shoot typical "fisheye" shots, but much more as a superwide or panoramic lens that has curvature which I don't emphasize. I have tested it using the X-Pro1's sweep panorama, and stitching worked! I have also tested stitching in the new version of Adobe Camera RAW with dramatic results.
I find it does very nice interiors with all four walls, when shooting from a corner. Landscapes are quite dramatic as well. Photoshop CC has tools that can pretty much straighten everything, but for the most part, I don't bother.
Thanks Patrick! My roster has not been favourable last few months, lots of daytime flights when there is too much light, or nighttime when it's too dark