Even just for tracing non-existing building outlines in OpenStreetMap - it would be a huge help.
Much of the work for Humanitarian OpenStreetMap Tasker (https://tasks.hotosm.org/) is building tracing - it would be a huge help.
If someone is good with machine learning please build this!!
To me, OSM should be the open Source Of Truth for all worldwide GIS data, a way to refer to our entire cartographic world in a digital format. Perhaps now it’s restricted to mapping data, but I would love to see the steering committee bring additional products out (temporal layers, the mapping you mention, and so on).
If OSM is important to you, there’s an open executive position advertised on the last HN Who’s Hiring post.
That position is only for the "OpenStreetMap US" local chapter, not OSM globally. OSM is quite large outside the US, so if you get that job, don't expect to be able to shape the OSM community & project, which can be like herding cats...
The best way to affect change like this in OSM, is to become active and respected in the project. It's quite a do-ocracy.