An aside to the development of the VCR was the format war that erupted between Sony's Betamax and JVC's VHS. While Sony stubbornly held onto the Beta rights, JVC licensed them to many manufacturers, leading to market dominance for the VHS format, even though Beta still developed high-end professional systems that could have eventually led to a better product filtering down to the consumer market. Although VHS was ultimately displaced and replaced by digital discs, the philosophy of JVC sacrificing its own share of the market led to a win for the format. The marketing approach may be as significant as the product.
Nobody ever stayed home on Friday to watch Gilligan's Island.
It first aired on Thursdays, moved to Saturday, and eventually Monday during its final season (No I didn't already know that; I had to look it up. That's what the web is for: an answer in 15 seconds to a question nobody cares about.)