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A clean, free reference that defines the terms precisely, with the classic disruption diagram. If HBR is paywalled for you, start here to get the vocabulary straight (sustaining vs disruptive, low end vs new market). Good to bookmark and re read whenever you are arguing about whether something is really disruptive.
Disruptive Innovation Theory
From Christensen Institute by Christensen Institute 10 min read
- Sustaining innovations serve existing customers better and favor incumbents.
- Disruptive innovations serve the ignored or the non consumers first.
- The trajectory of improvement matters more than the starting point.
