My last iPhone worked perfectly, but stopped receiving updates. 8 months ago, I replaced it with a new iPhone for security reasons and some Apps did stop workin

My last iPhone worked perfectly, but stopped receiving updates. 8 months ago, I replaced it with a new iPhone for security reasons and some Apps did stop working too. At first I was annoyed that I needed to replace it, but once I started using my new iPhone, my only regret was not upgrading sooner. I use my phone so much that my quality of life improved drastically. The iPhone planned obsolescence after 6 years seems pretty reasonable to me (I did the math and liked the numbers). But regardless of the 6 years or not, next time I'll probably upgrade sooner to have another step function increase in my quality of life. The market (like myself) seems to demand a 6 or less year life-cycle. At least this way Apple is planning for it, and is striving to remove all negative externalities of obsolescence. Wouldn't this be equally effective, while also being (given market dynamics) more practical?