I have marked one street manually that no longer existed and was now gated. The only other person who 100%ed the city it’s in had also manually marked it. I updated the data in OSM.
I’ve considered manually doing others where the last node is hard/impossible to get to…but then I just got a little ambitious. There’s no adrenaline rush like sprinting through well-marked private property…I save those nodes for rainy days.
Recently I ran 6 miles just to get to the small neighborhood with the street I had wanted to do and, when I got home it turns out I missed the last node of the street, so I need to go back at some point…but hey, that’s the whole point of this site right?