What killed tin pan alley in the music industry?

Tin Pan Alley declined primarily due to the rise of rock 'n' roll in the 1950s, which shifted popular music away from the traditional song formats and styles that dominated the era. Additionally, technological advancements, such as the advent of television and later the internet, altered how music was consumed and promoted. The emergence of independent record labels and the changing tastes of younger audiences further diminished the influence of the Tin Pan Alley model, leading to a more diverse and fragmented music industry.