The Realtek 2838 dongle I used to pick up 978 traffic ran warm from the start and finally died last week after a couple of months use. Disassembly didn’t reveal any heat damage and looks like the heat sink material was firm against the case and board. It was mated to a Pi 3B with stock power supply. The rig was kept indoors.
I’d like to get another one but am curious about how to extend its life if heat is an issue.