Hyundai is offering an 8 year or 160000km battery warranty on its Electric Vehicles sold in Australia. And based on the various Utube videos on how to build your own Lithium Ion battery out of Samsung 18650 4V cells, I imagine EV owners will be hacking their own replacement batteries in time - like Ebike owners are doing now. My Leitner ebike battery is built of 18650 cells. You can even build PowerWall type batteries for home out of 18650 cells. There is a company called Vruzend that makes Lego like connector blocks and jumper straps to connect individual cells together, you just need a cheap BMS circuit connected to it.
https://youtu.be/rylbFnTgFI8
Most large Lithium Ion batteries are just plastic cases full of 18650 cells tied together.