According to the video, the unpopularity of MF gear in Path of Exile 1 is partly due to the way it scales. The speaker mentions that a little bit of magic find gear is significantly less effective than having a lot of it. This makes acquiring MF gear less appealing because the payoff is not as great as acquiring other gear that directly benefits the character’s damage or survivability.
Here’s a more detailed explanation provided in the video:
The speaker acknowledges that the current system for magic find is not ideal and that GGG is planning to revisit the way it works in Path of Exile 2. They want to make magic find more rewarding without making it necessary to have a massive amount of it to see significant benefits.