The gfx card makers also need to add the ability to use certain functions and APIs to their various cards. As it stands, VRS, Mesh Shaders, SF etc are only able to be used in AMD cards via DX12U, while Nvidia offers it via DX12U and others. So if you are a dev, and both Xbox, AMD and Nvidia use DX12U for those extensions, you are more likely to use the one API and port across to PS5 after, rather than use Vulkan on Nvidia, DX on AMD and Xbox and Sony’s API on PS5, especially when only DX supports Sampler Feedback.
It really is the easiest option at this point. My question then is if Devs use DX12U across PC and Xbox, and utilize those specific extensions such as Mesh Shading, VRS and Sampler Feedback, not to mention Direct Storage when SSDs become more common in PC’S, how will the PS go with not having those features? Its going to put it at a disadvantage no?