That was a very wise decision on your part. The batteries do not last forever especially if you frequently charge it beyond 80% or discharge it to less than 20%. Without the warranty by the time your battery has gone tits up it would likely not be worth replacing.
It depends on the EV model. Tesla battery replacements are way more expensive than with Kia/Hyundai EV’s batteries.
For me the decision to make one of our cars an EV came down to these points:
It was time last year to replace my wife’s car anyway.
Having one ICE car and one EV gives our long distance driving some energy security in that if the Dims mess up gas supply we can do our driving in the EV. If they mess up power supply we can do our driving in the ICE pickup. Currently gas prices are too darn high so we do most of our driving in the EV (26K miles per year).
We have further energy security by having lots of solar. I simply can’t drill and refine oil on my own to fuel my ICE pickup. But I supply 82% of the power we need through solar, including charging the EV for about 22K to 23K miles per year that are charged at home.