Cryptoboreas has GREAT service and reliability and the cheapest rates in North America...but ALL S9's are now mining at a loss.
My S9's have not even reached roi nearing their second birthday. they will be taken offline very soon.
They performed rather well actually out of 27 S9's with 81 boards I only had 8 boards and two controllers and 2 fans die on me...10% failure rate over 20 months.
If it is your second year that is a lie. All my S9's ROI within 2 months when I got them 2 years ago due to price hike...
Also about 5nm you don't just press print designing the chip is a long process and the technology to make 5nm with a high yield is not that of production quality right now. Why do you think intel and samsung are not doing it right now and they are a massive foundry.