At the extreme, the demise of Microsoft would trigger an immediate and prolonged crisis response to everyone whose IT systems depend on it (i.e. essentially eve

At the extreme, the demise of Microsoft would trigger an immediate and prolonged crisis response to everyone whose IT systems depend on it (i.e. essentially everyone, either directly or indirectly), both on-prem and for cloud services. At some point it is less about who owns the tree, and more about how much of the forest it will take down with it if the owner shows up and chops it down. Facebook is not exactly at Microsoft scale on this, but it would still require an enormous about of human effort to reconstitute all the organizations, event planning infrastructure, relationships etc. that people currently manage via IG and Facebook.