is it common for bitmain to release china-only products? relatively new to this
any chance this would be available in NA?
Yes, they do that occasionally. They had a GPU miner (G1 I think) that was only ever available in China.
We'll have to wait and see. I'd like to get a couple of those S9 Hydro. If they're as quiet as the C1 was it would be perfect for heating during the winter.