I understand, but at least if we are to consider the march towards communism as the continued development of humanity onto a qualitatively new level, this is a progression. We can be conservationists with respect to the environment, but certainly not conservative. To try to hold back the wheel of history is to be reactionary, not progressive.
The state is not opposed to the market, which is why I brought up the Nordic countries and China. In capitalism, the state serves capitalists. In socialism, the state serves the working classes. A socialist state is necessary for supremacy over capital, which is why revolution is necessary.