Actually, quite practical. Living in Michigan you know that proper heating makes driving much more comfortable in the winter time. Gasoline engines have a very poor energy efficiency. This is why electric cars make much sense. Modern auxiliary heaters, on the other hand, have a very high efficiency. And the fuel consumption is very low => low emissions. And you can burn ethanol instead of gasoline...
According to "Energy and Power Plants" by Dr. John Zactruba, here are some efficiencies to consider:
Coal fired power plants: 32-42% (supplies 41% of the world's electricity for the grid)
Natural gas power plants: 32-38% (supplies 20% of the world's electricity for the grid)
Hydro Turbines: 85-90% (YAY Canada!)
Therefore, the energy to charge a very efficient hybrid car is coming from, generally, electrical sources on the grid that are at fairly conventional efficiencies. Of course if you live in Canada, and your power comes mostly from hydro, that's a different story. So driving an electric car today makes the owner/lessee feet very green, all they are doing is pushing the carbon emissions and efficiency (or lack thereof) upstream where the electricity is generated.
Now if you have an electric car, but have any kind of heat engine (petrol, alcohol or whatever) to "keep it warm" or related, you are just negating the effects of the car's electrical efficiency! As others pointed out small engines are not subject to any kind of emission controls.
Because we have cold winters in Michigan (gotta heat the batteries and heat the occupants) and hot summers (gotta cool the batteries and cool the occupants) PEV cars just don't make a lot of sense in this climate. The car is spending a lot of energy just managing the climate control of the occupants AND the batteries. Not so in SoCal as someone pointed out...
Unlike many who speak of PEV cars, I've owned TWO of them. They are "not ready for prime time" but I'm sure glad there are early adopters. Rather than pure PEV cars I think the Prius and Chevy Volt powertrains are the best ones for today's society, since they are well done hybrids. The Prius, ugly as it is and uninspiring in so many ways. has a solid, mature, highly engineered powertrain platform.
But again this thread wasn't about electric cars in general, or PEV vs hybrid vs gas only, but just how poorly thought out the Tesla X engineering was. This was from a high end shop that regularly tears apart everything from gull wings to Ferraris and knows a well done car when they see one. Keep reminding yourself: $10,000+ plus 90+ days to fix a 5 MPH crash...that's what started this thread here.
We of all people here, this group of Pagoda owners, shouldn't be speaking of carbon efficiencies or pollution or green or anything of the sort. A well tuned Pagoda puts out a huge amount of everything that caused the US EPA to create pollution mandates!