ASIC - TOO LOUD TOO HOT
GPU - EXPENSIVE and HARD TO MAINTAIN ( OS crashes, PCIE connectors failing , power supplies getting dusty, cards failing)
Asics are definitely too loud and hot. I have 48 GPU cards running in my office right now and don't mind them but I have one ASIC and I couldn't even stand listening to it in my garage. It is in a separate detached building.
GPUs are not hard to maintain and I haven't experienced failures. I am running 8 rigs each with 6 1070s and have been for about a year. To date I have had to replace one $10 USB flash drive. No other failures. With the 8 running 24/7 I have to reboot a single rig (not always the same one) about 2-3 times a month.