100% agree with you -- locating files isn't a problem of ANY OS -- IT'S USER PROBLEM !!!!! He's probably left them on a mobile phone / or in the Cloud.
Windows doesn't LOSE files -- although I would suggest that in File explorer the DELETE option shouldn't be right next to RENAME (right mouse click in File explorer) --if you have a laggy mouse or something similar you can easily click delete instead of rename -- and if nobody has ever done that then we've a whole lot of fibbers around. !!!