It's actually really hard to align different data sets, their schemas, and their quirks, licensing, restrictions, completeness, conflicts, etc. And with governm

It's actually really hard to align different data sets, their schemas, and their quirks, licensing, restrictions, completeness, conflicts, etc. And with governments and local governments pretty much doing their own thing everywhere, it's a unique set of challenges for each city pretty much. And half of the problem is that they are not being required to actively work on this problem. The work related to that is hard work and somebody needs to pay for that. OSM makes it possible for people to contribute their data but it doesn't necessarily solve all the issues. A lot of the data in it actually comes from various people importing data. All the low hanging fruit here has long been picked.