Resist the urge to purge. I shot the four frames that went into this panorama back in 2005 with my second digital camera a four megapixel Minolta S404 that only produced jpegs. Four megapixels seems incredibly lame by modern standards but I can state without a hint of equivocation that I have never seen a bigger improvement in image quality than when I went from a one megapixel HP to the four megapixel S404. My next jump to a six megapixel Nikon D40 improved on the S404 but not as much as the jump to the S404. The same holds for the jumps to sixteen and twenty megapixels.
I remember trying to stitch this panorama with 2005 software. It didn't come together. Today I dropped the frames into the latest version of Affinity Photo and this popped out. Panorama software is much better than it used to be but it still requires inputs. As I said, resist the urge to purge.