Product design question
Give me an example of the biggest mistake in product strategy of a successful product that led to its downfall.
- Walmart
- Product design
- Hard
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What this question tests
Strategic judgment: recognizing how a strength can become a liability if a market shifts, using a real example.
How to approach it
- Pick a concrete, well known example, for example Blockbuster's reliance on late fees and physical stores as streaming and mail order DVD rental emerged.
- Explain the original strategy's logic: physical stores and late fees were highly profitable and matched the market at the time.
- Identify the blind spot: the company optimized the existing model instead of investing early in the emerging streaming or subscription model.
- Explain the downfall mechanism: a competitor with a lower friction model captured the market shift while the incumbent protected its legacy revenue.
- Draw the lesson: a strategy tied too tightly to a current revenue stream can prevent a company from responding to a structural market shift.
- Connect the lesson back to a general principle: watch for when your core profit center becomes a reason to avoid necessary change.
What a strong answer includes
- Uses a real, well documented example instead of a vague or invented one.
- Explains the strategic logic of the original success, not just the failure, showing balanced reasoning.
- Names the specific structural shift, subscription and streaming, that the incumbent failed to adapt to.
- Draws a transferable lesson rather than stopping at the anecdote.
Common mistakes
- Picking an example without being able to explain why the original strategy made sense at the time.
- Stopping at describing the failure without extracting a generalizable lesson.
Likely follow-up questions
- What early signal should the company have acted on sooner?
- How would you apply this lesson to a company today facing a similar shift?
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Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 4: Discovery and strategy for AI products
- Chapter 7: AI UX and human oversight: design for a system that is wrong sometimes
- Chapter 14: Get the job: the AI PM interview loop