So much misinformation as usual anytime anything comes up about photography.
yes rangefinders are prefered (or were) by street photographers because the cameras and lighter and smaller, the lenses too, with the mirror box to overcome the lenses can focus much closer to the rear lens element which makes for lighter, smaller lenses. The main reason for their success in street and journalistic photography was because what is moving into and out of the frame is visible at all times, and in crisp clear focus, no matter where the lens is focused. if you shooting a tank rolling into the city center its better to know what else is going on around you and you don't want to have to focus the camera before realizing you're going to get run down by an M1A1 Abrams.
Please let's confuse retrostyled with rangefinder. That doesn't the Fuji X series aren't good, they are, for an APS-C sensor they are decent performers with some nice lenses.