maturation
noun [ U ]
formal uk/ˌmætjʊəˈreɪʃən/ us/ˌmætʃəˈreɪʃən/ ECONOMICS, MARKETING
a stage in the development of a market, industry, etc. when it is no longer growing as fast as it did when it was new:
Some experts believe we are now seeing the maturation of the computer industry.