How about a full size spare tire instead of a bicycle size?
Or springs on a hood instead of a little metal rod to hold it up? And while you’re at it, leaded gas (mmmm mmmmm I miss that smell!) and freon until I see snowflakes coming out of the vents! Get er done!
When I bought my Chrysler Pacifica van, I searched out and purchased a full-sized OEM rim and a tire the same size as installed on the vehicle at the factory. I am enough 20th Century to want to cling to this vestige of the past, as it much simplifies the reliability of the spare tire once mounted and in fact does not take up all that much room. With the seats folded down (they stow in the floor), there is a enormous amount of space to simply lay the spare, plus a scissors jack I purchased separately, and tire wrench all at hand for Plan B. Plan A is to call AAA.
When all the seats are up, there is room for the spare and tools in the rear-seat stowage space within the rear hatch. I did consider an exterior mount for the spare, but that would take considerable modification, like a swing-out mount on the frame of the rear hatch. Just inconvenient even if it could be done, always in the way of opening and closing the rear hatch.