needs to be noted that it's increasingly uncommon to be able to do so. for desktops you have to build everything yourself - prebuilds (either gaming or workstations) have proprietary PSU and motherboards (in case of workstations, sometimes CPU is bound to the motherboard / manufacturer, for example Threadrippers). Windows laptops now often come with soldered RAM and soon will probably be without M.2 slots like Macs.
Well my PC is built on my own and I change parts every year or two. My laptop is a Thinkpad from last year and Im pretty sure I can easily open it to replace something just like my last one.
needs to be noted that it's increasingly uncommon to be able to do so. for desktops you have to build everything yourself - prebuilds (either gaming or workstations) have proprietary PSU and motherboards (in case of workstations, sometimes CPU is bound to the motherboard / manufacturer, for example Threadrippers). Windows laptops now often come with soldered RAM and soon will probably be without M.2 slots like Macs.
There is Framework though I guess