Would you? Really? It is my understanding the Oculus folks were working on that partly for fun, partly because they have a purpose (the purpose being "VR gaming would be soo cool!"). Their idea of a "comfortable retirement" may very well be to continue working on the Rift. I would also be surprised if they didn't care at all about the community.
Seriously, what would you do if you won $2b tomorrow? I know I wouldn't retire in Malta or such, because it would quickly bore me to death. I would need to do something, and I suspect, so do you.