Linux beer: Displaced the various flavors of UNIX beer by being free (as in beer) and is extremely popular where that's important, i.e. everywhere. Tasted a bit manky in its earliest brewings but eventually got tasty enough to displace all the other UNIX beers, although Solaris beer brewers fiercely insist to this day that it's not nearly as good. Currently the most widely drunk beer in the world, although its detractors point out that for most of that it's only an ingredient and not being drank straight up. Its drinkers have a one-sided rivalry with Windows beer drinkers for some reason even though the latter has long since ceased to care.