`sudo powermetrics` will tell you die temperatures. It's possible the author has a bad sensor, in which case the fans will ramp to max whenever the machine is not asleep.
FWIW I run the same machine (except 32 GB) and a 4k external display. It's silent when idle (~45C) and quiet even when loaded (~97C).
FWIW I run the same machine (except 32 GB) and a 4k external display. It's silent when idle (~45C) and quiet even when loaded (~97C).