So why use cruise control? :wink: Besides, people hypermile Corvettes.
Of course coasting if possible is more efficient, and as you know regen does not recover all the slowing energy because of losses. Anyway, I get it, you prefer cruise control, but consciously trying to be efficient when driving should beat it.
Probably worth mentioning another reason for Roadste cruise control. It's hard to see the speedo. Both of them!
Regen (not braking) is what locks the CC in on the Roadster. Coasting would of course not lock speeds.