Oddly enough, I dont miss my rotary engine at all. I loved how it sounded and felt, but it seemed like every time I beat on the car, I thought "is today the day the apex seals go bye-bye"... I wanted to remove that disaster magnet with a quickness, unfortunately I didnt remove it before it found disaster.
I do miss my FD a lot, it was a blast to drive on the street, but very uncomfortable on the track with a helmet. At 6'4" my head was all over the roof, and I had an R2 with the solid roof and slightly more head clearance, which did nothing for me. Which is a primary reason I didnt get another one.
And psssh, 4 rotors are for noobs, its all about the 12 rotor now, hahaha.