Perhaps unsurprisingly, Kris uses Linux (Linux Lite):
Having used Microsoft Windows for a long time, I find Linux operating systems to be remarkably better, even more so because they are free to download and install. Furthermore, Linux operating systems do not steal your personal data and do not try to lock you in, like the newest operating systems from both Microsoft and Apple do. That said, even with Linux, obsolescence cannot be ruled out. For example, Linux Lite will stop its support for 32-bit computers in 2021, which means that I will soon have to look for an alternative operating system, or buy a slightly younger 64-bit laptop.
I feel the 32-bit support. That was part of the reason I needed to upgrade my old laptop, although I’m happy I did.
How and why I stopped buying new laptops | LOW←TECH MAGAZINE