Really frustrating that newer versions of iOS inevitably run more slowly on aging hardware, Apple incessantly prompts you to update, and there's no way to roll

Really frustrating that newer versions of iOS inevitably run more slowly on aging hardware, Apple incessantly prompts you to update, and there's no way to roll back. Sure, I miss security fixes if I don't update, but at the point when Apple stops supporting the hardware, what's the difference?