The Inverted L-Curve Framework: A Proposed Conceptual Model of Incumbent Vulnerability in Technological and Market Disruption

This paper introduces the Inverted L-Curve Framework (LK-ILCF), a proposed conceptual model for examining a possible trajectory of established market incumbents: an extended period of strong competitive position followed by accelerated deterioration after a fundamental change in the architecture of competition. The framework identifies two phases: the Long Horizontal Line, associated with the Illusion of Invincibility, and the Sudden Vertical Cliff, associated with Architectural Collapse. It also proposes the term New Market Crush for the disruptive force challenging the incumbent's established basis of competition, and Ecosystem Trap for the difficulty of responding after a rival ecosystem has gained momentum. Nokia, BlackBerry, Kodak and Blockbuster are used as illustrative case studies. The paper positions the framework alongside established work on disruptive innovation, dynamic capabilities and ecosystem strategy. It defines conditions for applying the framework, advances propositions for future testing, and identifies limitations. Its central proposition is that the duration of market dominance does not necessarily predict the durability of competitive advantage.