https://coltura.org/electric-car-battery-life/

I have been married for more than 20 year, have 4 children (3 teen-aged drivers), and two electric vehicles. I paid less than $25,000 out-the-door (including sales tax, etc.) for my brand new 2025 SV+ Nissan Leaf. Where I live in Washington state, gas is >$4/gal and electricity is less than $0.08/kWh. I get better than 4 miles/kWh. After 250,000 miles, a vehicle averaging 40 miles/gallon will have spent $25,000 in gasoline (at $4/gal). With my electric rates, electric "fuel" costs for the same 250,000 miles will be $5,000. So a $20,000 difference in fuel costs.

Looks like it is ~$8k for a 62 kWh Nissan Leaf battery:

https://vivnevs.com/products/62kwh-nissan-leaf-battery-pack-...

Every EV sold in the U.S. gets a federally mandated transferable battery warranty of 8 years/100,000 miles. Buying new or very lightly used and getting rid of it before the warranty expires is an option for those with infant-mortality battery anxiety. We are not in the early adopter phase with EVs anymore, so it is less of risky-new-thing-that-doesn't-pan-out. It is OK to be a late adopter. But it is a much nicer of an experience. And no oil-changes or going to the gas station (I wouldn't recommend getting an EV if you can't charge overnight at home). Have you ever test driven an EV? EVs pretty much sell themselves, once you get behind the wheel.

Good news is you stumbled on first Leaf model with actually actively thermally managed battery so at least in theory if Nissan didnt screw anything your battery wont degrade like older 1 and 2 gens.