It's also much easier and cheaper to build and repair a desktop in a normal tower with normal parts that you can get in the neighbour store when it breaks down

It's also much easier and cheaper to build and repair a desktop in a normal tower with normal parts that you can get in the neighbour store when it breaks down at the worst possible moment (last week for example when the harddrive broke together... or the week before when the memory gave up and computer started crashing... Or last year when one of the other computers graphics card fan gave up) Open up, replace part, boot up and test. Back to work.