I'm so amazed by the amount of problems that can be solved by using this data.
Need to find out the nearest drinking water tap. They got you covered.
Need to know how you can enter a particular subway station as a blind person? The data should be there. Including traffic lights with audible feedback.
Want to charge your ebike at your destination? Find type of bicycle rack and the availability of power outlets.
Need to mail a letter? The collection time of the nearest post box is there.
Planning a trip? The access fee of an attraction is documented.
Need to find a gate at any airport. ...