Comment by WorldMaker

That seems to be a myth. Real world data is showing most EV batteries are still in their first use (powering cars) at the 20 year mark. Once you have removed early model years of Nissan's Leaf and Tesla's everything before they began actively managing battery temperature (and removed the high totaled by accident rate of Teslas), EVs are generally lasting 15-20 years.

(The other direction: the costs of battery replacements haven't gone down because the demand mostly doesn't exist. The "range degradation" of EV batteries at 20 years isn't noticeable to the owners at 20 years.)