EV batteries are lasting longer than expected.

Also, when accounting for maintenance over, EV's can be cheaper over time even with a battery replacement. They don't need oil, engine coolest, or transmission fluid. There's a whole life support system for ICE cars that EVs just don't have, and what replaces it tends to last indefinitely if there are no manufacturing defects or have an abusive owner. Brake maintenance is also reduced; they need the fluid changed, but regen braking tends to reduce the need to replace pads. Manufactures were already seeing pads and rotors on hybrids last nearly the life of the vehicle.

It all adds up, and while the $10k battery cost years down the line scares people as one big number, it often ends up being less than what you would have spent on maintenance over the same time period.

Finally, the batteries may not be worthless at the end of that time. Putting them in houses for backup power is often still feasible. You're just not getting the same range out of them anymore.