Not too long ago, Scott27 said roadsters were going to go through name changes when he went through the UKL platform I think
He basically said:
Z1: fwd compact/smaller roadster
Z3: similar to current Z4 but with soft top. Also going back to very popular name
Z5: up-marketed current Z4. A bit bigger and hardtop (more of a gran turismo)
Is it going to be Z1, 3, 5 or Z2, Z4, Z6??
I prefer 2, 4, 6 just because I feel like even numbers mean coupe or sportscar even though "Z" already means a roadster. I don't mind if bmw makes an exception to fwd being only contained to "1" series