There are definitely situations where it’s more expensive, like if you exclusively use DCFCs. My electricity is 15 cents per kWh at home (so that’s where i do all my charging), but the local ElectrifyAmerica station charges 48 cents per kWh, which would make my Model 3 cost 13 cents per mile, which is damn near what my Honda Accord costs me in gas (gas is $3.87 per gallon right now. at $3.25 it would be cheaper).
I feel for people who don’t have the option to charge at home and I hope that problem gets solved quickly