and you should never under estimate the benefit of a fresh piece of cloth.
So while you can sometimes make something with stitching things together, you can't always use stitching (or HDRI) to make up for the short comings of gear.
Conventional "wisdom" out there at the moment seems to be use image stitching techniques for making your wide angle lens wider (or your normal a wide). Such as this image ...
This image was made with a mild telephoto and stitched together from 5 images taken in portrait to make a highly detailed wide format landscape.
Sadly however this doesn't always work, as nature often is not as patient as me and spoils things by moving.
So when I tried to align these two images the churning clouds have moved between images and re-orienting the camera to make adjustment difficult / painful / tedious or plain old impossible. The above image was (as it happens) taken with my Bessa I on two sections of 6x9 film. I wish I had of had my 6x12 camera and a 75mm lens.
Sometimes there just is no substitute for one take.