Won't the weight of the convertible top make the performance of the RC worse? It just seems unnecessary to me. And you lose all the trunk space. I've always maintained that convertibles look best as two-seaters. Like a Miata or a BMW Z4.
I think that chances are this will be built though. Lexus seems to be happy to make plenty of variants for the RC.
I want an RC 350 convertible. I presently have a 2011 IS 350c, and I am ready for a replacement. I am also considering a F Type Jag, but would prefer a hardtop convertible. I would also consider the new Ferri California but only in my best dreams.