I travel by train quite a lot, as do other folks I know. I have yet to meet anybody, at first hand, who I trust to speak the truth, and who spotted ransomware on a station display. By 'trust to speak the truth' I obviously exclude all journalists.
Also, put yourself in the shoes of the malware authors. All Software has bugs and vulnerabilities, and there is no reason to think that new software has any fewer bugs than software written a decade ago. There's always going to be a plentiful supply of nice juicy vulnerabilities in recent software, not yet reported in the field, be it Windows, Linux or Apple. If you were in it for the money, why focus on an ancient OS like XP when there are just as many vulnerabilities in newer versions of the OS, and far more people running these versions?