The post-2000s work of David Harvey exemplifies this. https://journals.sagepub.com/doi/pdf/10.1177/08969205221137765

The vast majority of Marxists, especially in academia, have abandoned the rigor of political economy—rooted in the primacy of production and production relations—and with it, they have abandoned the revolutionary essence of Marxism.* * https://brill.com/display/title/72195?language=en&srsltid=AfmBOoqPv2iC0m-U2o-5KLCH92J0p1NLRqmsP2f_zI0WaE2Iffzm3Mi4