And lest we forget that Susan also eventually was shown to be a very good mechanic as well, being able to fix a bus that broke down before transporting Big Bird and other kids to Camp Echo Rock, and she also is the one who works on hers and Gordon's Volkswagen.
Then, as we mentioned in this thread already, Maria also worked as a construction worker at some point, as Sonia has noted this was during the height of Feminism in the 70s.
These are all of the positive ways that SS has always been both subversive and progressive at the same time, and for all the right reasons. We might have even gone a step further had Gordon and Susan been an unmarried couple living together, as was originally suggested, though Joan Ganz Cooney insisted they be married.