A number of manufacturers, including Canon and Zeiss, make cine-optimised lenses for still photography mounts (e.g. EF). For reasons well-covered elsewhere, these lenses are stupendously expensive, mostly for reasons which aren't particularly relevant for still photography: none of focus breathing, a varifocal lens or slight colour shifts between lenses are a serious problem for most applications of still photography.
If I did suddenly happen to come into a ridiculous amount of money, would I notice any significant advantage in using one of these very high priced lenses for still photography, or would it be just a waste of money because they're optimised for a different use case, and I'd be better off using a regular still photography lens instead?