Why get a T9 over an S9?
Also contemplating whether T9s would be worth the extra energy costs in long run due to better product longevity.
I'd consider myself very lucky if half of my S9 ASICs last for 2 years, sustaining original hash rate.
If an average T9 does last the expected 2 years without any faults, it could be a better option for ultra-low electricity cost mining farms.
I think proper cooling is very important, they can run in a 40deg C environment as advertised but the lowest the better. Mine are running in a 15-17 deg C room temp at internal temperature averaging 70 deg C.