I’m unfamiliar with the history of the nazi usage of late stage capitalism; unlike the Z acronym , it doesn’t have an explicitly fascist, anti-Semitic meaning in the term itself. There’s nothing inherently nazi in saying late stage capitalism the way there is in using the Z acronym.

Let's see if I've got this. In a Marxist context, it refers to a capitalist system under such stress due to its internal contradictions that a near-term rupture is possible, which could take the form of a proletarian revolution. In a Nazi context, it's meaningless -- Nazis are fine with capitalism.