Tesla Model 3 apparently has a 6 year service interval.
Electric cars are still greatly more efficient on energy usage compared to gasoline cars. You'd have to grossly overcharge for electricity to make the comparison anywhere close.
Use this calculator to see the difference in fuel vs. electric costs:
Gas cost per mile at 30mpg @ $3.00/gal is $0.10.
In most cases, yes, it's going to save money. You'd need a high MPG car in an expensive electricity state that has somewhat cheap gas to really flip that.
Also you lucked out with a particularly reliable model. I can guarantee you there are plenty of 20-year-old cars that are riddled with engine and tranny problems.
Surprised me given their reputation. I will not be buying any more of them.
How many miles do you have on your focus? My edge started degrading fast after about 100,000 miles.
Will electric motors be more reliable than internal combustion engines? Probably. But it's a difference that's not going to be noticable by most people.