Some Mapillary photos are quite old. They can give good hints that something is wrong in OSM. But they cannot tell you whether the situation has changed and whether OSM matches the more recent situation. There is only one truth which is the ground truth. Thus never change OSM without knowing the most recent truth you have seen with your own eyes.

High Mateusz,

did you test tertiary streets in rural areas that are sparely mapped? I could imagine that the white streets on nearly white background could be worse than before.

Here is a good place and zoom to test: http://www.openstreetmap.org/way/171827562#map=12/53.4137/7.6700

regards Tirkon