Electric Vehicles

My wife just bought an Ioniq 5 with 20k miles. It still has 2+ years on the factory warranty and the battery is warrantied until 100k.

I didn't realize that she had purchased an 8 year/100k bumper to bumper warranty for $3,500. That seems crazy expensive and redundant to me.

I can still get a refund if I hurry.

We have never had an ICE vehicle this would have paid off on. However this is our first EV. Are there any unusual things that might break that I'm not aware of? The sales guy just kept mentioning sensors and electronics, which seemed like a classic scare tactic.

Update: Warranty cancelled. Thanks for the input.