Yeah every couple years I buy new hard drives.
I have about a dozen that are about 10-20 years old. It’s getting hard to find a use for them, but so far I just use them as a 5th level backup, write once. I also destroyed a bunch that were too small.
This is meaningless without knowing miles driven, cost per gallon and kwh.
Generally EV’s fuel costs are less than gas in CA but not an order of magnitude less.
E.g. a 30mpg car will cost 16c / mile in fuel in CA at $5/gallon. In Wyoming gas looks to be $3/gallon so 10c / mile. An EV getting 4 m/kwh will cost maybe 5-10c per mile depending on your plan in CA. It’s significantly better but not as much as implied by the OP.