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@randulo also, graphics is exactly the sort of specialised situation I was describing - few people 'get' graphics & what's actually going on. Few have a valid mental model, or even understand what most of the stuff in a graphics package is doing. Adobe spends a small amount of its massive extracted profits to educate people on *their proprietary way* so that the model taught is intrinsically tied to the Adobe product, not the underlying concept. It locks people into proprietary very effectively.