View of the sunset over Alicante from Santa Barbara Castle.
I also made a 160 megapixel version of this photo. It ended up the "most stitched" photo I've ever made: a nine-shot panorama of three-photo HDR stacks, processed with two different white balance settings. Since my travel laptop didn't stand a chance to stitch that, I had to wait a month before I could see if I had managed to capture the photo correctly or if one of the 27 exposures would be off and ruin the whole photo.
The time it takes to capture the panorama, the number of photos, and the wait together make these multi-megapixel HDR panoramas very difficult. When taking a single photo you can always just look at it on the camera and see if you got it or not. HDR stacks are similar, but you scroll through three photos. Panorama and HDR? You need to check 27 photos, and if you notice something wrong you may have to re-shoot the whole panorama which is a two-minute process. For time-sensitive subjects like sunsets you have at most a four minute window to catch the right light, so it is really a test of your abilities to do things fast and right.