I'm not sure about everyone's apprehension with 70C+ temps. With 95F+ ambient temps and at stock speeds, my Z9 runs 73-76C with the fan set to auto. When I move the fan to 100%, the temp drops to 66-68C. When I move the unit up to 750Mhz and set the fan to auto, it runs close, but not completely at 100% with the same 73-76C temps. If I move the fan to 100% at 750Mhz, the temps stabilize around 71-73C.

The specified operating environment for the Z9 Mini is 0-40 ℃ (32-104F). So in an environment that falls within those specifications, the software is trying to keep my Z9 in the low to mid 70s. That tells me this is a fine temperature for the unit.