The only PCs left that aren't subject to vertical integration are gamer PCs, and even lose are losing to consoles, as people focus on other devices for their daily computing activities.

Large majority of the population is using unupgradable laptops, where at most memory sticks, hard drives, battery can be changed.

I haven't touched a desktop at work since 2006.

Some even make do with a tablet for their computing needs.

Likewise those that have servers in-house, those are no longer PC towers under a desk, rather slice of pizza boxes in server racks.