For clarity, when Lenin referred to "state capitalism," he also called Germany "state capitalist." State capitalism was used by Lenin to refer to a market economy heavily managed by the state, with large state enterprises as well. The difference Lenin drew between the NEP and Germany was the socialist state, and the imperialist junker state of Germany.

Later, this became clarified to be a socialist market economy to refer to the NEP and what China/Vietnam have, where the commanding heights of industry are overwhelmingly publicly owned and marketization helps with lesser developed and secondary industry, and state capitalism now is better fitting for the ROK, Singapore, etc.

Regarding Deng Xiaoping Theory, it isn't revisionism. It was a tactical retreat in order to accelerate and stabilize economic growth, facilitate technological transfer, and enmesh China within the world economy. Xi Jinping Thought is not a reversal of Deng Xiaoping Theory to a more socialist economy, but instead the same concept, Marxism-Leninism applied to conditions contemporary to China. Deng did not reverse Mao's industry but built upon it, and Xi is not reversing Deng's advancements but instead carrying them to a new era.

It was a tactical retreat for strategic gains, so to speak. The Xi Jinping era is built on foundations laid by both Mao and Deng, and required both. The bircage is allowed to be tightened by Xi because the growth was already accelerated under Deng, allowing a new era, towards more planned economy. I don't like framing it as socialism vs. capitalism, but socialist market economy vs. socialist planned economy, planned being more advanced.

As for db0, though, the problem is that all of this is state capitalism, because the state controls the means of production. That's literally it, last we discussed, and db0 therefore considers state ownership to be state capitalism. All nuance is dead.