I could imagine a large number of reasons, but to be honest, shows that were making money have continued even after untimely deaths of the main author/director. So, it's very likely they didn't make enough money to secure further investment, or the original investprs pulled out, or the studio bosses bought new sports cars and let everyone go and dissolved the company. (That happened to a friend of mine on the animated feature he had wrotten, and was directing. He spent a whole year drinking heavily after that)
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I can read facial expressions. I did the test.