ICE car engines are not 40% efficient. More like 30%. To get 40% efficiency with a combustion engine takes having access to a running water source for cooling since you need to run the engine at high temperature to get to that level.
My main gripe with electric cars is the lifetime and replacement cost of the batteries. If you plan to own a car for over a decade it can be really expensive. It really depends on how often you switch cars I think. You also have the issue there are next to no standards and all these cars being sold right now in a decade will probably be sent to the scrap heap due to lack of standardization it will mean there will be no parts to fix them.
That's why it makes sense to get an LFP car. LFP batteries will survive the lifetime of other parts that potentially, you can create an LFP recycling business where recovered LFP batteries from cars are used on all sorts of other purposes such as to support home solar power.
Toyota has extended the warranty of all batteries in its hybrid from 5 to 10 years. I would assume that is how the industry would set it.
At some point the aftermarket may come in and sell battery conversion and replacement packs for older models using LFP.
If you go with a factory replenishment pack, which is expensive, your car can look to life for another 10 years or more.
For an early generation EV, the Nissan Leaf has proven to be outstandingly reliable even among EVs. This despite Nissan's worsened reputation on reliability thanks to its ICE powered vehicles.
The five most reliable electric cars
- Tesla Model 3 (2019-present) Reliability rating: 93.3% ...
- BMW i3 (2013-present) Reliability rating: 94.1% ...
- Kia e-Niro (2019-present) Reliability rating: 95.8% ...
- MG ZS EV (2019-present) Reliability rating: 96.5% ...
- Nissan Leaf (2011-2018) Reliability rating: 98.6%
AESC manufactures the Leaf batteries. This was a joint venture between Nissan and NEC. Somewhere along the line, 80% of the company was bought by the Chinese Envision group, and it now goes by the name Envision AESC. The remaining balance of ownership is with Nissan. We expect Envision AESC to supply batteries for current and future Nissan EV projects.
For me personally I don't see any problems at all if you or I would still choose an ICE powered car in the future. In fact the very idea that ICE will disappear in the very sunset is the very reason of its attraction --- get it while it lasts. Enjoy it while it is still around. Perhaps one day your ICE car or SUV might even be a collectible.