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I've argued before that if we had to pick one basic task resolution system to run the game on, it would be better to give everyone access to low level spells than skills; assigning a limited daily resource to overcome problems and playing a press-your luck game as you run out of it is more interesting than the usual reactive skill rolls. At least then players have a choice of what they prepare to do each day, when they sped their resources, and so on. Skills don't have very good gameplay.
Assuming that you are referring to 5e D&D - in many way it is a game that design wise is still bound by nostalgic expectations.
That being said; the idea of Skills working the same way that Magic does has a far better chance of gaining traction than converting D&D's magic system to some kind of casting roll.
I do agree that Skills don't have good gameplay in D&D, largely because they have always been a tacked on afterthought.