Stadia's primary barrier to entry is that it's Vulkan-only. People are not choosing Vulkan because of Stadia, because Stadia has no actual incentive to develop

Stadia's primary barrier to entry is that it's Vulkan-only. People are not choosing Vulkan because of Stadia, because Stadia has no actual incentive to develop for it due to having no playerbase and no market; but if you are already developing for Vulkan, supporting Stadia shrinks from an ask the size of supporting the Switch in addition to PC, to just the size of supporting Epic or GOG in addition to Steam.