OSM Germany is absolutely detailed. Honestly, german contributors could spare some time mapping in other countries.
At least for the more fundamental information like paths or trails this is true. I only really get to map stuff when in holidays abroad, because here you have to check a 100 times if something is mapped to find a handful of chances to contribute anything, which has a frustrating feel to it 😅
Have you heard of Streetcomplete? If not it’s an app which turns OSM mapping into a game of sorts.
It shows bubbles for missing information at your current location. I.e. what’s the surface type of this particular road or way? What kind of parking lot is this? What are the opening hours of this shop?
Yes I know it, and sometimes use it for a little. But the vast majority of things it presents to complete to me feel rather unimportant. My leisure time isn’t exactly plenty, and then I rather do other things I see more value in. Even surface type is mapped most of the time, and I don’t take the effort to map surface quality because it is not used for anything. Maybe I’ll make an App at some point that infers surface quality automatically while road biking from the acceleration sensor in the phone mounted to the handlebar…