See my Sigma SLR lenses wishlist at B&H Photo.
I’ve added twp 240 megapixel 9/10-frame stitched panoramas to the examples posted about 10 days ago in Mt Whitney and Alabama Hills, Pre-Dawn to Early Sun.
These panoramas are spectactular, but really need an 8K display at the minimum or a 15 X 5 foot print where it would still be 153 dpi. At the least, view it on an Apple iMac 5K. I have no space for such an image as a print, but it would be awfully nice to see it at that size. Check out the climbing anchors on top of the spike at center in the full-res version!
My thoughts with such results is that there is no need for medium format; dynamic range of the Nikon D850 is just about as good, and it’s faster and asier to operate a 70-200 on 35mm than on medium format.