Right now, that's true: some maps are better in certain regions than others. But I don't think it's a given that "it's not the case that everyone is better off using the same mapping service". Being an OpenStreetMap contributor, I like to think that one day, the map might be complete enough that this is the common basis for all mapping services. The data is free to use, as long as you're willing to give credit and release any additions under the same license.
Hosting is not free and even open source apps like OsmAnd limit the number of downloads unless you buy the app. It's also still a big challenge to present the data nicely and make a nice user interface. There will definitely still be opportunities for competition and profit, even if all data is open. So hopefully, one day, everyone is better off by having a single, complete map available to use for anyone :)
Hosting is not free and even open source apps like OsmAnd limit the number of downloads unless you buy the app. It's also still a big challenge to present the data nicely and make a nice user interface. There will definitely still be opportunities for competition and profit, even if all data is open. So hopefully, one day, everyone is better off by having a single, complete map available to use for anyone :)