Then maybe the solarpunk people you know did not understand what they stand for or much of anything really. All i am trying to say is all movements going towards the left are helpful to some degree, it would be smart to unite more and reach a form of socialism. Instead of fighting over which utopia might work or not, since in the end a utopia can by definition never be reached. Marxist communism also just stops short of advocating for the utopian vision communism, but it surely is the aim.