“My 11-year-old laptop can compile the Linux kernel from scratch in 20 minutes, and it can play 1080p video in real-time. That’s all I need! Many users cannot afford high-end computer hardware, and most have better things to spend their money on. And you know, I work hard for my money, too – if I can get a computer which can do nearly 5 billion operations per second for $60, that should be sufficient to solve nearly any problem. No doubt, there are faster laptops out there, many of them with similarly impressive levels of compatibility with my ideals. But why bother?”
—Drew Devault. ” Why I Use Old Hardware. drewdevault.com. January 23, 2019.
One of the advantages of using free software is that support for old hardware tends to get better. The more free you go, say to the level of wanting a free bootloader such as libreboot and all free software drivers, the more likely you are either using old hardware or you are spending a lot of money for a free machine from companies like Purism.
My main computer is a Lenovo Thinkpad T400 with libreboot. You can buy one for <$150 on eBay.