People focus too much on discs and cartridges, but too little on licensing and drm. The disc is meaningless if you cannot run it after drm servers died. Also, very often the game on the disc is unplayable because of lack of day-1 patch. Meanwhile you can burn games you bought from GOG on a cd and play it 10 years later without internet connection. So the physical vs digital discussion is completely irrelevant to the problem.