It wouldn't surprise me if the electric vans are only economically viable due to subsidies. Companies can get even bigger tax cuts on green investments. So when the tax breaks end the electric vans will likely dissapear again.
You say things like this but with no evidence at all to back up your PoV.
Electric vans make a huge deal of sense in busy city centres, a local delivery firm (DPD) has started using them for many of its local deliveries. The hub and spoke model of delivery centres is actually ideal for this because most of the vans are doing less than 100 miles in a day. So they can fit easily one shift within a full charge.
In the UK, a small electric van costs 3-4p/mile in electric plus requires less maintenance, whereas a diesel van getting 25 mpg will cost almost 17p/mile in electric. Over 100,000 miles of driving that's £14,000. That's half the price of the vehicle, and puts a vehicle like a Nissan eNV200 at comparable price to its non-electric brother.
Now add up lower taxes, maintenance costs, brake pads etc (and time out of service due to all of these) and in areas like London an exemption from the congestion charge / toxicity charge and the economics start to become quite clear.
I wonder, do you ever visit a city like London? The air there is absolutely toxic, you can taste the pollution. It is a bit like humid air, but then you realise it's 10'C outside and 45% RH so it's not humidity. It makes my nasal congestion go into overdrive. I am 100% in favour of banning any ICE vehicle from a city centre within 10 years, even if you don't accept the science of climate change and the lower CO2 emissions of an e-car, you must see with your own eyes the harm that the pollution from a hundred thousand cars driving in and out of a city centre every day does to the poor f**kers living there. (Myself, that's one reason I absolutely refuse to live in a city centre.)
I wonder how much each poor Norwegian tax payer has to subsidise a wealthier person's Tesla? If you buy a Tesla at those highly subsidised prices, can you immediately resell it across the borders in an EU country?
AFAIK it's a case of EVs being less expensive than petrol vehicles because new petrol vehicles are (rightly) taxed more. Also the Norwegian equivalent of benefit in kind for EVs is really low, so attractive for business users.
One benefit this subsidy seems to have is that older EVs/PHEVs are depreciating quite rapidly. For instance in the UK, you can buy a Nissan Leaf for under £8,000 if you look around a bit, and decent spec/mileage ones are less than £10,000. The Golf GTE PHEV that I drive is half the price it was new 3 years ago.
The idea that EVs are proving unpopular once subsidies go away is a bit crap to be honest. There's been no slowdown in Model 3 sales despite the tax credit being only $3,700 now (half what it was a year ago).