bourgeoisification

Bourgeoisification is the process of becoming bourgeois—adopting middle-class values, tastes, and aspirations.

The term often carries a critical edge, suggesting that a person, neighborhood, or cultural movement has traded authenticity or radical energy for comfort and respectability: The bourgeoisification of punk rock was inevitable once major labels got involved.

Close to gentrification when applied to places, but broader—it can describe individuals or entire subcultures growing conventional.