There really isn't savings on maintenance, all the cost is frontloaded and backloaded. It costs almost as much as the car itself to replace the batteries at the end of their life and EVs are pretty much universally more expensive to purchase in the first place for this same reason.
Also Europe has more expensive petrol prices than the US in general, that calculation is aggressively region-dependent.
The real kicker is GP is correct, mostly. You don't have to do much for optimization for the day-to-day operating costs to be less, but you do have to generally be wealthy enough to own your own home with a garage to install a charger in (or be super lucky and have one at an apartment, which is quite uncommon still).