As Blizzard pulls Warcraft 1 and 2 from GOG.com, we have to ask, why aren't they on PC Game Pass yet? Why aren't dozens of Xbox's Activision-Blizzard games on Game Pass yet for that matter?

Warcraft 1 and 2 are being removed from the DRM-free GOG.com at the behest of Blizzard, for sadly obvious reasons.

source https://www.windowscentral.com/gaming/pc-gaming/at-gog-we-believe-that-games-should-live-forever-blizzard-once-supported-gog-com-with-its-classic-warcraft-games-but-not-anymore-but-why