For iOS maybe. Most of those applications are also using Apple's networking libraries and are effectively required to be on Apple's infinite software update treadmill to continue to be listed, keeping them young and hip in perpetuity. This is the upside to that treadmill, things are up to date or just stop working.

But I don't think that's representative. "Or just stop working" isn't a valid alternative to the rest of the world. Outside of mobile ecosystems and maybe web development most things aren't on these 6 to 12 month update cycles. It would be absolutely unreasonable to tell a hospital that every piece of hardware and software and MRI machine in their building has to be upgraded every 2 years or it's positively geriatric and do you even `pacman -Syyu` bro?

Theres a whole world of things that haven't been, and may never be, transitioned. Useful things like utility control computers and even peoples' 10 year old, still perfectly functional and supported desktops. Heck, my "end user" newly-installed fibre ISP doesn't support IPv6! And their previous DSL installation to the same address did! So much for "solved problem" :(