You can replace the battery for a fraction of a new one, I basically have that already.

My second battery of my 6s now makes trouble again, no other issues. I struggle to come up with a good reason why I shouldn't get a new battery for another 2 years.

Agreed. I upgraded to the X from a 6S and that was a huge bump in performance and capabilities.

Now that X is starting to show its age I am considering switching to the 12. All the upgrades since the X so far have not been appealing and did not warrant spending that much to me.

That's hilarious. They make the battery impossible to replace for consumers and then you need a new phone every two years and you see that as a feature.

AAPL is a strong buy.

Thats my point you don't need a new phone every two years, at three years I notice a slight decrease in battery life, I would imagine it will keep being useful for another two easily and I could take somewhere to get a new battery if I really wanted.

On the other hand I have old windows phone devices that had replaceable batteries I never utilized as they stopped updating the software after a year. Sounds like the Android side is similar. My Apple device have been some of the longest lived useful computing devices I have used even with the difficult to replace battery.