The way I look at this is akin to mobile phone tech as its sort of the same thing with operating systems etc. So this year Apple will bring out iOS18 the newest operating system for apple products, this will make iOS15 redundant and no longer supported, you will still be able to use iOS15 equipment but there will be no support, iOS15 was released in 2017... 2017 let that sink in for a second, that's only 7 years, so your electric car could easily become " unsupported" in the same amount of time, so battery life may not be as bigger issue as people think, maybe it could be support for the operating systems that will make these cars redundant, the resale price of a battery car at 10 years will be near zero as who wants an unsupported 1/2 battery life car!