CONCEPT
Entry Barriers
The structural obstacles preventing new competitors from entering an industry — economies of scale, capital requirements, access — which AI has lowered by an order of magnitude in knowledge work.
Entry barriers are the structural features of an industry that make it difficult or costly for new firms to enter.
Porter identified several sources: economies of scale that incumbents enjoy and entrants cannot immediately match, capital requirements for competitive operation, access to distribution channels, cost advantages independent of scale (proprietary technology, favorable locations, learning effects), and expected retaliation from incumbents. High barriers protect incumbents by limiting new competition; low barriers expose incumbents to continuous competitive pressure from entrants. The profitability of an industry is inversely related to the ease of entry: industries with high barriers sustain higher returns because incumbents face less threat of new competition eroding their positions.
In The You On AI Field Guide
AI has lowered entry barriers in knowledge-work industries by an order of magnitude. Capital requirements have collapsed because AI substitutes for the large specialist teams that previously constituted minimum efficient scale. You On AI documents this directly: products that required teams of five and twelve months of runway can now be