Group 1 - The article emphasizes the importance of using prototyping tools for product managers, arguing that even experienced managers should not underestimate their value in expressing product logic and functionality [1][3] - It highlights that product managers who do not engage with prototyping tools may overlook technical implementation costs and development cycles, potentially leading to delayed user satisfaction [3] - The article points out that a lack of competitive analysis can result in poorly designed products, as product managers need to understand market trends and competitors' strengths [4] Group 2 - It discusses the negative impact of product managers who infrequently engage with development teams, suggesting that regular communication is essential for understanding project progress and addressing issues [5] - The article criticizes product managers who focus solely on technical aspects without considering commercialization, which can lead to product failures [8] - It warns against product managers who resist adopting new technologies, as this can hinder their ability to meet evolving user demands and market trends [9]