The big issue I run into when talking about "state capitalism" as a concept is that most people who use it level it as an ideological accusation towards a state rather than as a material analysis of the present. So when someone says "China is state capitalist" they mean it in the sense of "China is only going to do state capitalism forever because they are tainted revisionists" and then the only real response is to deny that, but in the present the system is of course state controlled capitalism because of a multitude of reasons but because of the framing you cant really admit that without giving ultras a rhetorical victory by letting them say "SEE? China is state capitalist and must be opposed".