That is true, but Lenin pointed out that the NEP was "one step backwards, so we can take two steps forwards" (he also thought it would last longer than it did.)

Dengism may or may not have been necessary for the survival of China (I suspect it was after the Sino-Soviet split), but we should never lose sight of the fact it was a withdrawal to allow development of production. Markets, let alone non-worker owned businesses, are incompatible with higher stages of socialist development and I am eager to see how China is planning to phase them out as it moves towards communist development.