In fact, Rosa Luxemburg made another great point here. Marxism should be treated as a living thing, at its best when it is interacting with the world, but all of the meaningful interactions of the past forty years have been Maoist actions. Marxism-Leninism and the respective, remaining ‘Marxist-Leninist’ organizations and parties have been caught-on-the-back foot, or docile, or lacking in direction, with few consequential actions taken, at best, and useless, irrelevant, if not outright misguided or wrong in many parts of the world at worst.
Marxism-Leninsm-Maoism has yet to produce a successful revolution, unless you are counting Nepal which I know you hate to talk about so let's discard it. How can you look at what Marxist-Leninist countries have done over the past fifty years and say that Marxism-Leninism has not advanced? It has advanced greatly, but you just dismiss these advances as "revisionism".
Gabe Newell