I definitely know that an open mapping solution could gain traction and be supported by bigger companies that would use it. It seems like a good candidate for the kind of collective OSS work that supports other projects- that there are enough big-enough companies out there that want an open non-google reliant mapping solution that are willing to pool resources.
I know that with mapbox and others that active work is being done, but it just doesn't quite seem like it's there yet.