Those are great thoughts.
I have had the Z3 6 years and it does really everything I want from a sports car. Extremely fun to drive, quick without being so stupid fast you can't enjoy it, and generally really competent and communicative without a lot of electronic distractions. And it really talks to you at the limit. I got it on a lark from a friend and have enjoyed it way more than I ever planned to.
The Bolt would be a nicer more all weather runabout. It's an appliance albeit one with 100% of its torque at 0RPM which is fun. Plus I am on solar and could recharge it daylight hours for essentially nothing.
I can keep the BMW, but the Bolt would then put me at 6 cars. Of course right now we are at five going on six drivers in the family and seven is three years away.... I don't like having a fleet, but that is sort of the family we have.
Giant Chevy Van for family trips/towing shit
Beater Odyssey minivan (270k miles!!) shared amongst 2 teens and the student driver (and me when I want to cart a bike somewhere)
Mazdasport 3 stick kinda beater for the Enthusiast 20yo who puts a decent amount of mileage on cars traveling to work and from college.
Mom's newer Highlander because she deserves it.
My BMW driven pretty hard during its 1500 miles a year. But mostly I ride a bike or walk to work.
As I think about it two of the teens will be in College in a couple months with no car. I don't need this Bolt, I just want it for the novelty and I know the non enthusiast drivers in the family would love it.