. . . . if Lexus brought out a totally-new replacement for the IS-C?

Same wheelbase and seat configuration and the obligatory retracting roof. Maybe an up-to-date four-cylinder engine although there is nothing shoddy about the V6 apart from economy.

Solid-state instrumentation and modern navigation. Radar cruise-control, high-end sound system and state-of-the-art gearbox with paddle control. Maybe even a stick-shift option.

The Germans have kept their convertible line-ups current, so why not Lexus?

. . . I can only dream.