It seems Amazon has financial and legal incentive to keep older Kindles (it is so many of them still) updated to avoid them getting jailbroken and not having Ki

It seems Amazon has financial and legal incentive to keep older Kindles (it is so many of them still) updated to avoid them getting jailbroken and not having Kindle store at their fingertips :) Not sure if they cut it off at some point, but they can surely keep updating 10 yo devices.