I can see how one company might focus only on developing its technical skill in animation, rather than other aspects that are important to a production (like wr

I can see how one company might focus only on developing its technical skill in animation, rather than other aspects that are important to a production (like writing, music, marketing, etc), and do contract work for anyone who wants to make an animated production, no matter the story / market / etc. Sort of like how TSMC mostly focuses on semiconductor manufacturing excellence and leaves the design to other companies, with only a small amount of its production used to manufacture its own component designs. But for studios where mastery of a certain animation style is critical to their work, vertical integration makes sense too.