I live in a place with year-round fair weather, so I use a petrol motorcycle as my primary vehicle, and live in a rented apartment with no dedicated parking space or possibility of using an at-home charger.
Even with incredibly high petrol taxes causing petrol to cost more than 2.2 EUR/L (like 9.5 USD/gallon), the public fast EV charger rates available at refueling stations are so expensive, that when you take great motorcycle mileage into account, it still doesn't pay to buy an EV, even when only considering charging/refueling costs. Of course, if I could recharge from slow household electric power, it would be a different story. But the politicians are already worried enough about the loss of petrol taxes that the odds, IMO, are quite low of EV charging staying cheaper than petrol refueling (particularly when the vast majority of the petrol price is taxes to begin with).
I use the PG&E EV2-A night tariff at home which is still 0.23 $/kWh, though the rate at work is only 0.14 $/kWh which I use as much as possible. I rarely use the superchargers (0.45$/kWh.) Let’s use the 0.23 value.
I drive 15k miles per year. At roughly 2.5 mi/kWh. That gives $1380 per year.
At 20 mi/gallon and $6/gallon, I’d pay $4500 per year. At today’s gas prices, the difference is IMO not marginal anymore. (That said, I didn’t buy the EV for the drive savings…)
My main point is that even with happy hour prices this is only viable for people which do not have to rely on external chargers, which is the majority. Currently EV is cheaper again, due to rapid rise of fuel prices, but the power companies with street side chargers generally "adjust" prices every year to match petrol and it's been for a long time cheaper to run petrol. Also: getting petrol from a few km away for cheap is easy, you are not going to park in the next village overnight to charge your car.