It turns out that the phrase "# rotary engine," unlike how it's described in an old Monty Python sketch, is no reason for embarrassment. Especially for Mazda, the only carmaker with the pluck to realize - and do its best to prove - that # weren't just for #.
Sure, it hasn't worked out as Mazda may have liked - the last rotary Mazda was the now-defunct RX-8, a terrific sports car - but it isn't as if the technology doesn't work. It just may not work as well as the conventional internal (a.k.a, to greenies, as infernal) combustion engine, especially in this day and age of increasingly mandated fuel economy.
But 50 years ago as of May 30th, the Hiroshima-headquartered carmaker began its legacy of, as Mazda's press release celebrating the anniversary said, "doing what was said couldn't be done." Mazda wasn't unique, if my aging memory is still working. General Motors was also looking at rotary engines at one time, but I don't believe they ever followed through. That would make Mazda the only major carmaker to wish the # onto the world, and the company did it not only via its sports cars (though never the Miata) but also via some very nice sedans and coupes. A coupe de grace, perhaps?