why didn't 8'' DD makers react to the emergence of 5.25'' DD?
- 8''DD has far superior capacity
- PC market was not their core business
- Advantage in existing technology, ie. 8''DD
- developingn 5.25'' DD will hurt their 8'' DD business
- due to the firm size, new entrants have higher incentive, like greater growth opportunities, in bringing disruptive technologies