For a lot of socialist groups, political education has a tendency to linger on abstracts.
This is something of an unfair stereotype, as plenty of socialist formations expand what they teach their members and supporters beyond the usual list of Lenin, Marx, Engels, Mao, and interpretations of the above. Inevitably, though, all socialists have to reckon with the legacy of Marx and the soaring achievements and miserable failures of the Soviet Union and these political education efforts return to reading Capital, or The Little Red Book, or The State and Revolution. Most groups structured along democratic centralist lines in the US have a new member vetting process and an intensive political education program that involves reading some or all of those thinkers.
This is not to say any of these books are unimportant, or the ideas in them lack vitality in the current times, or even that the kind of thorough political education that groups other than DSA engage in are bad. They absolutely are not. They are merely a different political approach that the one DSA uses, the difference being largely created by DSA’s looser and more open organizational structure and the political inexperience of your average new DSA member when compared to the average new member candidate for a democratic centralist group.