Not even a month ago I made a search for a famous place in Lisbon (you know, big metropolitan area, capital of Portugal, 11th-most populous urban area in the European Union) and Apple Maps didn’t even know it existed. Made the search in DDG and it found it, from where I had to copy the address and manually search for it in Maps.
Or I could’ve used Google Maps in one try, but I genuinely want DDG and Apple Maps to succeed so I keep trying. But please do use the best data of both, don’t replace one with the other.