An Apple Miata is the dream. Take the design team from the MX-5 NA days and marry it to Apple's design team. Both are exemplar in engineering and the result has me drooling as I day dream here.
It’s a terrific car if you want a great handling convertible at a low price point. As you said, it’s fun.
It’s not good at moving a lot of people or things, or going really fast, or lasting for 500k miles, or being as cheap as possible. Other cars are good at some of those things, but what is the Miata missing that is otherwise required to be a ‘good’ car?