Argh, so over elements of the gaming press running the whole 'Intel is a newcomer to graphics, let's give them a pass on how broken the product is' line.
Intel absolutely is not a newcomer to graphics, they have been the largest GPU manufacturer since at least the late 00's. Yes, that is in integrated graphics, but integrated graphics need drivers too, and they have introduced new architectures in iGPUs as well, they should know how to develop and release functional graphics drivers for new architectures on release.
From an architectural level, there is little difference between between an iGPU and dGPU, one is just a larger version of the other. It isn't like Intel is having issues with their dGPU memory controllers which is one of the only new elements in a dGPU. The issues they are having are not a symptom of trying something new, just bad mismanagement and incompetence which is a common theme for Intel outside their core x86 market, especially given their massive engineering and financial resources.