The document discusses the evolution of the airport industry and business models over the past 30 years since European liberalization began in 1987. It outlines the key impacts on airports, including a shift from traditional operators to commercialized airport companies that leverage non-aviation revenues. The business model has expanded to view airports as multisided platforms serving airlines, an airport city, and consumers. However, airports now face both conjunctural and structural challenges to their traditional aviation revenues from factors like digitalization, requiring strategic shifts to capture more value from their expanded customer bases.