1. iRobot declared bankruptcy due to competition, debt, and regulatory hurdles. 2. Amazon's acquisition efforts were blocked, leading to detrimental impacts on iRobot. 3. Cheap knock-offs affected consumer perception and sales of Roomba products. 4. Regulatory scrutiny is tightening for tech mergers, impacting market dynamics. 5. iRobot's failure illustrates risks for companies dependent on big tech acquisitions.