A tech startup aims to develop a general-purpose AI assistant designed to help users with everyday, practical tasks like planning a trip, writing a friendly email, or getting cooking advice. They are considering using a large, publicly available fine-tuning dataset that consists of over 100 academic natural language processing tasks, such as grammar correction on formal texts, sentiment analysis of news articles, and question-answering based on historical documents. Evaluate the suitability of this dataset for the startup's goal. Justify your evaluation by explaining the primary limitation of this type of dataset in this specific context.