Why hasn't Microsoft just _bought_ Valve? Promote cross-play between xbox and PC, give developers incentives to put out games on both platforms, and nuke the games section of the Windows store in favour of a link to Steam?

Other than legacy enterprise stuff, gaming is the one area where consumers continue to be tied to Windows. It seems like a no brainer for Microsoft to lock down that market. The average Joe/Jane that needs to do write some emails, pay bills etc. is fine nowadays with an iPad, Chromebook, etc.

because valve isn't for sale. i wouldn't be surprised if gaben once got a sweeter deal than notch for mojang but turned it down.

If im not mistaken Gabe worked for Microsoft before he found Valve.