You do not lug dead batteries around. The car performs like any other hybrid with the batteries regenning as you drive increasing the performance. The weight gives almost 50:50 weight distribution and an exceptionally low centre of gravity making the handling very good for a saloon.

The Prius Prime/PHV gets better fuel economy than the plain Prius once the grid charge is used up, despite the couple hundred pounds of extra weight. The bigger battery lets it hybrid better.

Put the kwh value in for gallons. That will give you MPKwh. It'll say mpg, but you'll know it's kwh instead of g. My RV has a hour meter on the generator, so I put that in the miles field, turns out the generator burns about 1 gallon propane per hour

You only get tiny gains from regen though, if you request the car to charge the battery whilst driving, it uses even more fuel to do just that. My friend hired an Outlander plug in, once the battery was dead, he was getting 19 MPG. I do still like the idea, they suit alot of people, I think if I had one, the ICE would only kick in 10 times a year if that, as the majority of my journeys could be done on the battery alone.

I plan to use the one pedal system and see how much gain I can manage. My goal is 5mi/kWH. Time will tell. Now if Fuelly will finally give us EV tracking or if I can find an alternate app to do it.

I do my mileage on a spreadsheet. I did it long before I found Fuelly and I still do it now.

I've sold my car to Carvana. They pick it up Thursday morning. I'm chasing a few "suspects" looking for an acceptable car and price. And now I need to start hunting for the app to track it with too.

Good luck with the search. If it's economy you're after, Model 3's are pretty energy efficient, but if those are out your price range, EVs from the likes of Kia/Hyundai are also pretty good, although your 5 M/KWH target might be a bit optimistic, most EVs average 3-4. At highway speeds you can expect even less. Some EVs get just 25% of stated range on the highway. Avoid Audi Etrons, they are heavy on the electrons.

I'm not quite ready for the EV switch myself, not until they start making electric Sports cars at an obtainable price.

Hope you get your Bolt at a good price. I see the Genesis GV60 is now available in the UK but it starts at £47,000.
And the UK government has done away with the plug-in car grant for all EVs.

I was quite keen on an i3 recently, but as they require both fossil fuel and electrical charge, the fuel cost per mile is identical to my Porsche Boxster. I can't quite get my head around that. I feel bad for all the people who recently bought an EV with fuel costs the way they are right now