Nah, like @blinvir said, some areas will be Swiss cheese, but this one has a lot of hotspots, should be some good areas left right to the end I think. Even the last Umbris world, which had smaller hotspots, had good areas left on the last day. I prefer to mine around alt 16 (lava surface level often I’ve found) but I get into a torn up area, I’ll go a little bit higher and low as the mantle, that is the range for it.
I’m so addicted to Boundless that even though Torchlight 2 comes out on console today - got my PS4 in rest mode waiting, I’ve waited a long time to play it - I’m thinking I’m still going to make another Blink run first. (And I’m still wondering how I never noticed the Blink flashing… sheesh I’m oblivious at times)
Anyways, these are great worlds to get rich off of - even without the Blink I get great hauls from the Blink worlds, tons of ore, fossils, and regular gems often.