Multi-cook households. If two people regularly use the kitchen at the same time, appliance positioning needs to serve both cooks rather than one.
Position the fridge somewhere central that neither person has to reach across the other to access, ideally at the end of an island or at a point where both prep areas are equally close.
Kitchens with a large island. An island changes how people move around the room and makes clearances more important than anything else.
Keep the fridge on the perimeter rather than integrating it into the island, so that opening the door does not block the main walkway around it.
What to do instead
The more useful alternative is to think in zones rather than triangles, a preparation zone with clear worktop space near the fridge, a cooking zone centred on the hob and oven, and a cleaning zone around the sink and dishwasher.
Each zone should have enough room to function independently, and the flow between them should feel logical rather than geometric.
For multi-cook households, planning two prep zones on opposite sides of the kitchen, or on either side of an island, tends to work considerably better than trying to make two people share a single triangle.