Concept cars in the 1970s were all about wedge-like forms, and the alluring promise of MORE! More speed, more aerodynamics, more technology, more optimism, more, uh, extreme. Not to mention less reliance tradition and lower coefficient of drag. What few concept cars made their way into production were all the more dramatic for their origins: the Fiat X-1/9, the Lamborghini Countach, and the Lancia Stratos all evolved from some of the most jaw-dropping concepts of any era. Toned down for production, sure, but the final cars still resemble the spaceships that never were.
This is a companion discussion topic for the original entry at https://www.hagerty.com/articles-videos/articles/2018/10/09/maserati-boomerang-concept