Except that is blatantly incorrect, as proven by statements Yoshi himself made years ago where he stated that ARR's engine is a new custom engine that used elements of, (or at least has similarities to) the Luminous Engine (such as here), and thus has nothing to do with Crystal Tools.

There is also no technical or remnants of 1.0 code used in the engine, technical limitations are entirelly the new engine's limitations itself. Crystal Tools was dumped out on the kerb for rubbish collection long ago. It's just a stupid meme now, and is as mistaken as 'spaghetti code'.