At the moment, I am on 40m FT8 RX using the Wellgood active loop stuck to the shack window. Noise level on the FT817ND is about S4. So far, 8 unique stations spotted (at 0800z) with the furthermost TF5B (1813km) in northern Iceland.
Although it will probably work at higher frequencies, I doubt it will seriously be used at HF.
See https://www.george-smart.co.uk/projects/wellgood_loop/ .
UPDATE 0858z: 32 stations spotted. The map shows the stations spotted.