XBox is one of the biggest publishers, where would all those Windows gamers go?

To a platform emulating Windows? (no need to correct me on how WINE works)

If at all they would be migrating to Nintendo and Sony consoles, if not having second thoughts about XBox consoles and cloud/GeForce Now.

Additionally, most of what Valve stands for will be gone the day Gabe is no longer at the company, enjoy while it lasts.