What's the situation for new iPhones? Is the compute power of chips more powerful than my computer eaten away by software latency? I'm thinking about buying one

What's the situation for new iPhones? Is the compute power of chips more powerful than my computer eaten away by software latency? I'm thinking about buying one. My iPhone 7 only started to very sligthly lag after the iOS 16 released and its update lifetime ended. I'm still using it. I don't even notice the lag if I don't pay special attention. And no, I'm not an Apple fanboy, rather a NixOS nerd but I need a phone that reliably works.