I think it's important to distinguish Marx's theories (dialectical materialism) from Marx's application of them. Marxists apply his method of systemic analysis

I think it's important to distinguish Marx's theories (dialectical materialism) from Marx's application of them. Marxists apply his method of systemic analysis to contemporary events to navigate global and local economic issues, but don't deify the man himself. Marx isn't a Nostradamus-like figure, and many people have added to dialectical materialism and the labor theory of value. To put it simply, Marx looked at this machine we're using to produce things and said "Woah, I don't think this machine will run more than another 150 years", and we've managed to duct tape and super-glue it to running much longer, the fundamental analysis of capitalism's contradictions are still true, we've just adapted better to them than he anticipated.