Who needs a conspiracy when your product creates such a terrible user experience? I've never written a lick of flash, and I don't care to. I still have awful memories of just how broken Flash sites were. They'd stick out like a sore thumb since none of the widgets ever worked like native ones, there were constantly keyboard focus issues in Firefox, video never seemed to be accelerated and would decimate battery life, the privacy nightmare of the persistent cookies you'd need to load a flash app from Adobe to clear (permissions as with everything else gave the finger to the host system/browser). Who could forget the near constant security and stability issues? I, for one, am glad flash died.

Flash died because while it sucked on desktop systems, it was somehow way worse on mobile just as mobile was becoming more important.