Chances of success are very low. Panorama stitching is quite delicate. People do it all the time but in specific cases. You have to be careful about parallax, movement between shots and consistency. You will be forced to try to reshoot countless numbers of times as people cross your field-of-view, moving vehicles reveal and cover different parts of the scene, light changes, etc.

Using the built-in panorama mode is further restricting since it only does one slice, not multi-row. So you would not get the same image-ratio as a wider lens unless you take the shots manually (locking focus, WB and exposure for the set) and do multiple rows. This of course increases the likelihood of more things going wrong and causing stitching errors.

Any time you would be shooting without a tripod would also complicate matters and reduce chances of capturing images that can actually be stitched. Even if parallax is not much of an issue with some scenes, you still have to have good framing with sufficient overlap.

It would be less risky for memory purposes to get a wide lens and crop when you need to. Resolution would be lost but at least you get a much higher chance of getting something.