I've gotten to the age where I want my software to remain the same. But instead it gets expanded, which makes my hardware feel slower and then I have a need to

I've gotten to the age where I want my software to remain the same. But instead it gets expanded, which makes my hardware feel slower and then I have a need to upgrade. From a security point of view it's sad that that fixes & new software go hand-in-hand. There is no LTS iOS, or LTS Android available. And then I have this brand new iPhone which isn't actually faster in browsing than a 5 year old one. Windows suffers from the same. My laptop has gotten a LOT faster over time, yet sorting by CPU on task manager literally takes 3 seconds on Windows 11. Why?