For beginners, there is also https://MapComplete.org
Verifying the environment - e.g. are the roads not overlapping, still somewhat up to date, ...
With mapcomplete, it is literally clicking 'upload image', taking a picture and waiting for it to be uploaded?
In Belguim, we are importing the official building dataset into OSM, but it is a slow process.
What do you mean with "it's not accessible to the broad public"? The pictures get linked properly with an 'image'-tag, so it shows up in e.g. OsmAnd.
Someone might take pictures of benches and another one will add the info if there’s a backrest from home.
What about https://mapcomplete.org/benches ? Granted, it does not upload to Wikimedia commons - but then again, Wikimedia commons isn't the right place for thousands of (mediocre) pictures of mor or less identical benches. A picture there should be "qualitative" and either "educational" or "relevant".
amenity=drinking_water is a place where you can get drinking water. There is no requirement to be able to drink directly from the water jet. Even more, the 'fountain=bottle_refill' makes it clear that this is not possible.
Yes, I looked into this as well, but there are apperently quite a few, contradictory ways to do this...
I have some more time. The tag literally reads "amenity=drinking_water", meaning that one can get drinking water for personal use here. It does not imply the physical form of this, e.g. if it is a bubbler fountain or a water tap. In either case, the tagging for the wide variety of items isn't very consistent...
I use maps for navigation (mostly OsmAnd) and improve OpenStreetMap with my self-made website (https://mapcomplete.org)
What would you use it for?