The two income family came as a direct result of Nixon’s Vietnam spending.

That's more complicated, since the Vietnamese War-Time economy was itself a driver of domestic growth. Stagflation by way of the OPEC crisis didn't force people into second jobs so much as it put the breaks on 50s/60s era rapid industrial development and the modernization of the consumer economy. Women in the professional workforce was more a novelty of the 1970s and the Feminist wing of the labor movement. And that's when a woman's college degree began to matter more, women were able to take on personal debt legally, and birth control allowed women to have sex without getting pregnant (thus ending the Baby Boom era).

Had Nixon not dropped billions onto Vietnam, we'd have spent our petrodollars somewhere else. Military Keynesianism wasn't the only kind.

All those cool loft buildings in places like New York’s TriBeCa and SoHo? Those were originally small factories. They emptied out because the owners couldn’t afford to runt them anymore.

They emptied out because businesses transitioned manufacturing outside of the major city centers. Mass transportation innovations allowed more and more labor to be moved across state lines. More of the urban economy became sales/marketing, banking, and bulk shipping. Its not like the jobs disappeared. It isn't even as though these businesses failed. They just migrated closer to the agricultural source material (which - conveniently - was where employers could find cheaper labor).