One bizarre Frasier conspiracy theory attributes a particular cultural shift to the sitcom and its regular use of Cafe Nervosa as a setting. After making the character of Frasier Crane one of Cheers' most interesting supporting characters, Kelsey Grammer carried over that popularity to the hugely successful spin-off, Frasier, which went on to become one of the most beloved sitcoms of all time. Frasier's huge cult following has ensured its continued success, proving that the cultural relevance of the show extends far beyond the decades in which it originally aired.
Though Frasier borrowed its titular character from Cheers, it changed a number of things about Frasier Crane and adjusted its tone accordingly. Perhaps the most significant of these changes was the introduction of the Crane family: Frasier had claimed Martin was dead in Cheers, and his brother Niles had never been mentioned. However, the addition of these characters contributed to Frasier's winning dynamic and, ultimately, to its success. One other minor change was Frasier moving on from his bar-dwelling days in Cheers, instead opting to spend his spare time in his local coffee house, Cafe Nervosa, with his brother.
Related: Martin Crane Faked His Injury — Shocking Frasier Theory Explained
According to one Reddit theory, Frasier may have been responsible for the rise of Starbucks in the '90s. This has led to the circulation of a conspiracy theory that Frasier may have been part of a psychological priming operation to help the growth of coffee chains — affectionately referred to as «Big Coffee.» It may well be true, too — there's no in-universe explanation for Frasier's sudden switch from alcohol in Boston to caffeine in Seattle, so this theory works as well as
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