2 Iron

RE: Dell TB15 Desktop Dock - Step-by-step driver/firmware/BIOS installation instructions for XPS, Latitude and Precision notebooks

Nope. Fans permanently at 3200 RPM even when the laptop is essentially cold.
This alone makes me not want to use the TB15.

And BTW, it's not just the TB15. Anything that you connect to the USB-C port (like a simple memory stick) and the fans will kick in).