Is there a video or article that you are referring to that can be shared?Battery box is "easy" to take off. Cell's are easy to change. Cell calibration can be done even with tiny charger and a bulb (?)..
With so much battery advancements going on I agree there will come a time when owners can retrofit batteries (solid state please!) with the help of 3rd parties - unless Volvo decides to more fully live up to its sustainability pledge by preventing more waste and making longer use of current items!
Yes, I'm challenging you, >>> Volvo <<<, to retrofit our SPA batteries when the time is ready!
And that would be around 8-10 years from 2015, making it 2023-2025. Hope you, Volvo, are working on a sustainability solution right now!