I have had both for a long time. No duds have ever been found. No clue as I said why some get it. I dont think its a huge problem. Back when this was a major topic only a few had it if I remember right.
Sups hammerhead , r u still running that wifi43 that u got?
My buddy that had the gg4 duds got it from thefarmgenetics last December. The worker that day told him that it was a hard grow, so they must've knew about the issue. I think he got a total of 12 clones from them or something like that. Two of them grew out to 5oz plants each, 9 per 4x4 tray under a light with 4 weeks veg in coco hand watered. The rest duded out.
I think the duds are out there more than we think, just that no one really believes in dudding and not all people reports the issue if it only happens to a small percentage of their garden. I got my recent cut from midnight farm and my first cut was from Craigslist. My second run I made my own clones from the craigslist cut. 1/3 of them had the dud issue and was culled