Of course Marx is outdated. Literally every academic will tell you that. His ideas were fundamentally flawed and not based on data which we now have. You read Marx in school to get an idea of how thought developed. It’s usually only the “leftists” in name only who just take one class in college on Marx and thinks that’s the modern state of progressive thinking. Warrens more progressive than Bernie or his supporters because her views are actually based on what data shows. At this point the only reason to reject the utility of regulated markets is to have your mind controlled by outdated ideology that has no relevancy in our modern world other than being very effective at melting the minds of the young to have “faith” (a requirement) in the devastating path that Marxism has brought to every society that fully tried to implement his ideas with the undemocratic and authoritarian force required - always claiming that salvation was around the corner.
"They only took one class on Marx"
Dude I took zero classes on Marx, & I still realize that he's basically correct about capitalism.
Like it's not a complex thing, capitalism inherently screws people, no Marx needed to recognize that. Marx is just the guy who wrote it clearly.
A line from the encyclopedia entry on "Capitalism" that correctly credits the word's origin to Marx and agrees with that statement that his analysis was so correct that you just need to look out your window to verify it.