The search results provide information about Elon Musk's social media platform, X, including its restructuring, new features, and the vision behind it. However, they do not directly address "postproduct details, positive, negative, ingredients, or materials." Therefore, based on the available information, it seems that the specific details related to "postproduct," such as its features, positive and negative aspects, or its ingredients/materials, are not covered in the provided search results. If you have a different question or need information on a specific aspect of Elon Musk's X platform, feel free to ask!