Seems to me that things like the degradation of battery capacity over time as a battery ages and the increasing load on a system as features are added to an operating system and applications in general should be accepted truths.
A person can't stop the battery aging process but one can choose to never update the software on their device. Should one choose to stay on an old operating system for the sake of battery life they should accept the compromises that come with it which include the eventual ending of periodic security updates and the eventual obsolescence of some applications as support for older operating systems by various developers ends. That solution isn't for everyone though, since we all use our devices differently, and it also isn't necessarily restricted to just the OS itself but also the applications that are installed which all go through feature changes as they continuously evolve.
Not everyone wants to purchase a mobile device and never reap the benefits of continuous software development after the time of purchase. It should be obvious that replacing a battery in a mobile device that has gone through generational changes in operating system and application versions will not result in the same battery life that the device had when it was originally released. So what's there to argue about and why the incessent need to use data to proove such things?
A person can't stop the battery aging process but one can choose to never update the software on their device. Should one choose to stay on an old operating system for the sake of battery life they should accept the compromises that come with it which include the eventual ending of periodic security updates and the eventual obsolescence of some applications as support for older operating systems by various developers ends. That solution isn't for everyone though, since we all use our devices differently, and it also isn't necessarily restricted to just the OS itself but also the applications that are installed which all go through feature changes as they continuously evolve.
Not everyone wants to purchase a mobile device and never reap the benefits of continuous software development after the time of purchase. It should be obvious that replacing a battery in a mobile device that has gone through generational changes in operating system and application versions will not result in the same battery life that the device had when it was originally released. So what's there to argue about and why the incessent need to use data to proove such things?