In the few days since I've taken delivery of my 90d I've noticed that the vampire loss in minimal, less than a mile overnight. In my '14 s85 I was losing 3-5+ miles a night. has anyone else noticed this?
Yes. 1-2 mile vampire loss per day is normal in my S90D with Energy Saving ON and Always Connected CHECKED (it's more like 7-8 if I flip Energy Saving OFF). More detail on this in a couple other threads including some detailed testing I did playing with those options to see individual and aggregate effect.