Fascinating Large Triangle Loop Antennas - The Mega-Loop

Many people have built one of these. They display some incredible characteristics higher up the frequency range, particularly on 20m and up. But still outstanding on 80m and 40m too. If you have the space, please build one! Callum, M0MCX.
Here is the Vertical vs Dipole debate: https://youtu.be/0tQg5LaQK_w