Low grades...Quite a few years ago I passed on investing in Detour based of the fact they apparently were low grade and going for high volume to be profitable. Of cource gold is gold and nickel is nickel. But I think the principle of volume mining applies here too. It just might take a bit of patience to get there. Early bird gets the worm they say. Lol https://www.mining-technology.com/projects/detour-gold/