Earlier quoted context omitted.
Gorbachev inherited 65 years of Soviet communism: a super fragile system, based on very tight, top-down command & control. On the surface these command & control societies appear more orderly than democratic societies, but they are very bad at dealing with complexity and at adapting to big changes. Gorbachev made the "mistake" of perturbing the system too much through his attempts at reform. Also, economically, I don…
The problem with your argument is the existence of China, to this day ruled by the Communist party of China. It's GDP grew by a factor of 25 since the fall of the Soviet Union.
The key problem with command and control economies in the 20th century was those economies were fundamentally limited by the command's ability to capture accurate market data, learn they key insights about that data and then execute smart decisions.
I'm not claiming China is capable of doing that today, but information technology has significantly improved the efficacy of the leadership's influence on economic activity. However, they were also wise enough to distribute the work of optimising markets by allowing business owners and capital investors to benefit from the efficiencies they introduce.
Simply put: The Communist Party of China has been using a very different playbook for the past 30 years and they've benefitted significantly and the effect of IT has had a profound impact on their efficacy.