Hi there,
I would like to add an opinion to this discussion.
I understand the issue about the non-accessible nodes and therefore the 90% are needed to have some streeta completed. In my city this is absolutely not a problem though. I have only run a third so far, but the only nodes that I missed, were
- corners of big places
- side streets with a dead end that I accidentally skipped
- building corners that are wrongly marked as street
- bus stops on main streets that are grouped with side streets that have the same name
All these nodes are accessible without danger or breaking the law. So the 90% is more or less useful depending on the city you are running. In my case it is absolutely not necessary. But the missed nodes are “painful”, especially if I could run them easily on my next run in the area, but I dont, because I have not noticed that I missed them.
As the node hunter also only shows missed nodes of incomplete streets, there is no (easy) way for me to find the missed nodes. I can only go to the completed-streets-list and check every single street by clickling “go” or “view” for missed nodes. That is a lot of manuel work. And I would also have to keep track of them outside of CS somehow.
If I could find missing nodes either with a hard mode setting as proposed here or with the node hunter in the lifemap, that would be awesome. Finding roads that are partly or fully incomplete is easy with the street list or simply on the life map. It’s the single nodes that are hard to find.
Hard mode as a user setting would not harm those, who need the 90% due to inaccessible nodes. They could just keep their 90%. But it would still be a big benefit for others.
People who want and can get the “true” 100% could alternatively use the node hunter if it displayed also nodes of complete streets.
So I would very much appreciate one or the other. 
Best regards,
Inqu