Also because of 8 (I can replace/alter parts of the machine without buying a new one.) desktops are much more environmentally friendly. My laptops usually last 3-5 years (and with this I'm using them more than my peers) whereas I have a desktop thats been chugging along for 10+ years. It had a few upgrades (SSD, RAM) and currently it functions as an internet browsing machine for my grandpa.
My PC is 17 ears old. Although I think only the case and two drives are left of the original build. It recently got upgraded again with an Intel Core i9 and 64Gb RAM. Upgrade I'm most torn apart over is the ortholinear ErgoDox EZ keboard, because after acing the layout, using anything else really throws me.
Also just gave away the remaining one of two 24" NEC flat panels I bought 17years ago. It still works.