In PG&E territory, an old Prius maybe gets 40mpg, and gas costs $4.90/gallon, giving $0.123/mi.

The current Model 3 seems to use about 25kWh/100mi. The off-peak rate (PG&E EV2-A) is 31c/kWh, giving $0.078/mi.

Tesla is winning, but not by a ton.

Supercharging seems to be a bit more expensive than home charging. Gasoline is less expensive outside California. Electricity is much less expensive outside of the investor-owned utility territories. Heck, Palo Alto (not exactly a low cost area) only charges $0.21c/kWh.

My previous car was diesel powered and used 0,6l/10 km.

Where I live in Norway, this morning diesel is around $1.85 / l (so around $7 / gallon) and that is on the cheaper side since the pandemic ended.

And some people choose amish buggy, doesn't mean it's shmik... And don't even get me on driving a petrol/diesel.