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Problem with cars is that a new-ish model of car a perspective buyer is looking at won't have much reliability data, 6 years at most before the model gets refreshed. I do understand your points though, I looked at the 2.0 TDI engine line and the 6 speed wet clutch DSG reliability separately before putting my money on the line. Whereas with EV, all special components are new and there is no prior evidence of their reliability.If I were going to buy an article based on reliability alone, I would value actual real-life data way above manufacturer guesswork if there was no actual real-life data to back it up.
To compare your example, 5D2 actual facts quoting 200K actuations or Nikon manufacturer saying it's rated to 200K but only just released camera. My guess would be that the Nikon will probably last the same as the Canon as Nikon have been at it for quite a while.
The point with camera, was that manufacturer quoted for the shutters is different to the real world data. Canon 5D2 had 150k manufacturer shutter life, but I had owned a 5D2 approaching 200k and was still going strong. If a new Nikon advertised to have 150k shutter life but historic data had shown older Canon shutter generally last 200k, are those points of data really comparable?
Both points indicates that we can't really compare real-world data against manufacturer data. I would go further and say you can't compare data from different manufacturers, because different manufacturer use different metrics/assessment/testing method.
The government hasn't took away all PHEV incentives though. Range extended EV still qualifies for tax incentive. The original BMW i3 REx from back in 2014 still qualifies.Really, Dragging a large battery round all the time and using it for the odd journey seems a very odd way to achieve efficiency to me. Be a bit like dragging round a full fuel tank if you're just doing just local journeys and topping up every time you used the car. Manufacturer's claims and real world would seem to be different which is probably why the Govt took away the tax incentive as PHEV were mainly being used as ICE for most of the time.
This is where I think cars will need to go, if public charging doesn't improve enough to allow people to travel confidently. A moderate sized battery to get people places most of the time, then a small generator to extend the mileage if needed. Like the LEVC new London taxi, a 20-odd kWh battery for 80 miles range (like my Leaf) and a petrol generator so you can keep going as the customer required.
This way, you get 100% benefit of EV's (cheap and ease of charging, regenerative braking, silent+refined vehicles, instant throttle response, and large amount of mileage covered with zero emission), plus an alternative power source that is light weight (BMW i3 REx is 120kg heavier than battery only) and able to operate at the ICE most efficient RPM + load.