I've just found another dark brown planet with 100% S02 that is labelled as terraformable. I guess they are quite common and I've never looked at them before.A terraformable with 100% SO2 atmosphere? Surely not ! (It's the dark brown planet pointed to by the blue cursor)
Great find! But...I discovered the largest recorded Earth-like world in an expedition last year to The Centre. It orbits a Herbig Ae/Be.