long time editor of osm here. what you describe is what the rapid [1] editor from meta does where user is forced to manually select objects overlayed sat imagery. is limited to 50 objects before user must push. a great method i think

[1] https://rapideditor.org/

That is what I will implement before bringing back the demo https://news.ycombinator.com/item?id=43448649

That kind of defeats the point surely?

Well it can still detect features in the satellite image that are missing on the map. That would already be a large help, no?

The point of what? Slamming a bunch of contributions in? Or actually improving the product for end users?

Adding missing features. I'm pretty sure if users are searching for swimming pools they'd rather have a swimming pool with slightly bent sides than none at all.