Diesel cars are going up in costs for sure over the next time. car manufacturers have to equip them with working exhaust cleaning, and I am sure, the fuel taxes are going to rise after the elections.
Electrical cars can also charge at your work place without it being taxed, that exception was made last year.
So I would see the Model 3 quite competing to a BMW 3 or 5 series - what is preferable pretty much depends on your preferences and needs.
Been thinking the same myself. This is purely my own speculation, but I can see taxation of diesel at the pump skyrocketing in the next two years.
All these plans to scrap petrol and diesel engines by year X are clearly not genuine, and people see that.
No democratic government in the western world as an authority horizon further away than the next election - so rather than trying to ban something that may or may not ever take, it just seems more practical and more likely to just keep pushing up the price of the fuel by taxation until it no longer makes sense for anyone.
Bonus: you don't need to offer a scrappage bribe from the public purse either.
At least here in Finland electric cars use the same taxation method as Diesel called "käyttövoimavero" which roughly translates to "usage power tax". This is based on weight so 0,015€ per day per 100kg. On top of that there is the "car tax" which is based on emissions which for electric cars is at the minimum which comes at 106€/year.
One thing I am sure of is that once the amount of electric vehicles starts to rise they will just up the "käyttövoimavero" (or come up with a new one) to make up for the lost tax revenue.
So I would see the Model 3 quite competing to a BMW 3 or 5 series - what is preferable pretty much depends on your preferences and needs.