It is relevant. I gave a counterexample, demonstrating that the software must not become much slower with improvements, unlike what Apple fans want to believe.
No, you pivoted to talking about your Linux phone, because your claim of "look at Firefox it's not becoming slower" is demonstrably false on iOS. The latest version of Firefox for iOS is pushing 400MB, over a 10x increase from a decade ago. I doubt they added 10x as many features. The developers of Firefox iOS chose to make the app larger and more bloated.
Firefox on iOS today is far more bloated than the version released a decade ago. It has more features, more bloat, and will run slower than the version released years ago. Claiming "It hasn't happened to Firefox" is a lie and that's why you deflected.
Firefox on iOS today is far more bloated than the version released a decade ago. It has more features, more bloat, and will run slower than the version released years ago. Claiming "It hasn't happened to Firefox" is a lie and that's why you deflected.