Да, чего обижаться, просто картографов мало или мир меняется быстрее, чем мы его рисуем (что не факт). Я как-то для себя писал в дневнике заметку:
Posted by Yury Yatsynovich on 10 August 2018 in English (English)
If M objects randomly change their characteristics every period (POIs open/close, buildings constructed/demolished, roads re-named/paved, etc.), while the OSM community checks and updates U randomly picked objects per period, then the accuracy of the map (the share of objects that are up-to-date) approaches 1/(1+M/U). Does anybody have guesstimates for the values of M and U?