I'd rather see Microsoft and/or Valve shoot themselves in the foot, which they have come close to a couple times. As they took more control over what software is allowed to run on windows machines (or within steam's launcher) there was talk of content moderation, of limiting the most violent/adult games. Had that happened, linux could have been the place for 'adult' games. It might still happen. MS could take action against ROM emulators, bittorrent, client-side encryption, or any other form of software that would send the masses running to linux.

Prison Architect ran into this. It shows gang violence, drug use and executions, all of which are red flags for those who rate media. Funny story: Prison Architect actually received a notice that it was in violation of the Geneva convention. Papers Please, an indi great, might also have been shunned had Valve/MS adopted MPAA-like content moderation.