The expansion of Markets was overall a return to a classical Marxist understanding of economics. Marx didn’t believe you could achieve Communism by taking an underdeveloped country and killing the bourgeoisie, but instead by nationalizing the large firms and key industries, and keeping market relations for the smaller ones, as markets are bound to centralize anyways. This has resulted in increased economic growth, and long-term stability, when compared to the era under the Gang of Four.

You develop into Communism, and can do so through methodical planning and nuanced application of public and private property. You cannot implement it through fiat or imagine it into existence, this was the failure of the previous Utopian Socialists like Robert Owen and Saint-Simon.