I'm averaging every 2-3 years. With the growth of OS and application usage they tend to bog down over time. e.g. My previous laptop wasn't fully compatible with

I'm averaging every 2-3 years. With the growth of OS and application usage they tend to bog down over time. e.g. My previous laptop wasn't fully compatible with Windows 11 and my hard drive was filling up, so I bought one with a newer processor, more RAM, and a faster/larger drive. I have a couple of older machines for old software and usually keep the previous machine for testing.