Privacy minded Linux users probably also know, spoofing your user agent is likely to increase fingerprint entropy and actually decreases privacy. It may have been true in the past, but I don't think anyone even recommends it anymore.
Actually that sounds like exactly the sort of nuanced reality that “privacy-conscious Linux users” aren’t that likely to know at all.
There's still plenty of web sites that check the OS and if it's not Mac OS, Windows, or Andoid it's no service for you. Faking your UA is not always about privacy, it's about defeating stupidity.