My Prius will coast sometimes. I try to find that for those short "almost at the traffic light" or "almost time to decellerate, but not quite yet" situations. I don't have to shift to acheive it, but I could if i wanted to, because my gear selector does have a "neutral" position.

I'm also not afraid to use electric-only, sometimes called "stealth," because even after depleting the battery some, the car always seems to recharge it rather quickly the next time I have to step on the accellerator for some reason (get up to new, faster speed limit, make a turn, stop and then re-go at a stop sign or traffic light, etcetera).

To repeat, I think of "gliding/coasting" as "free distance", and I think of "electric-only stealth" as "almost free."