It's a scale and the original commenter was talking about Apple's approach which is that entire board would need to be replaced. When it comes to PC desktops, you can still upgrade the CPU, RAM and Mobo without needing to upgrade the GPU (Costly), power supply and storage devices.
PC's have always been this way and sometimes you get lucky that you can use the same slot for a long time, other times you dont.
For me, if I wanted the latest CPU I would need to upgrade my mobo and CPU. But not my RAM, my GPU ($1500), power supply or my SSD's. If I was on a Mac and one of these parts broke, I would need to actually buy all of the internals again which are soldered to the main board.
PC's have always been this way and sometimes you get lucky that you can use the same slot for a long time, other times you dont.
For me, if I wanted the latest CPU I would need to upgrade my mobo and CPU. But not my RAM, my GPU ($1500), power supply or my SSD's. If I was on a Mac and one of these parts broke, I would need to actually buy all of the internals again which are soldered to the main board.