That's one of the reasons Cultural Marxism became the successor. It has some ideological differences as well. It's way less SMASH CAPITALISM and way more long march of the institutions, if you're familiar with that term. It's also less reliant on abstruse texts and more reliant on simple word games, which low IQ swarthoids can implement and comprehend. Most importantly, it swaps out a focus on economics with a focus on identity politics, and in particular race/sex politics.
But one of the biggest reasons I want to characterize Cultural Marxism as the successor to Marxism-Leninism is that its practitioners seem to be the children and grandchildren of Marxist-Lenists, literally. You'll notice Cultural Marxists venerate Marxist-Leninists in spite of all the "problematic" things they've done. Nobody is tearing down statues of Marx even though he was "white" and he literally harped on about niggers and explicitly discussed the JQ. They don't regard Marxism-Leninism as evil or wrong exactly, just, ya know, kind of passe as far as fake counter-cultures are concerned, like punk rock and marijuana. They treat it like something their dad might be into. It's for dad and grandpa. Ya know, he had a good run, and you should be polite when he tells his stories of getting into brawls with those Nazi Skrewdriver fans or getting arrested for 5g of weed on his road trip, but it's not really pertinent anymore, and we shouldn't let him decide how things are going to be.
"Did you take your medicine?"