At this point, the writing is on the wall: Enough educated people know that Seagate is rubbish. The only arguments otherwise are "I personally have not had a problem". Meanwhile class action lawsuits and real-world data are showing that they are indeed worthless. Essentially, there is no excuse for anyone who calls themselves IT or Hardware enthusiasts purchasing a Seagate product and then bitching about quality.
I don't agree that people knowing Seagate drives suck = people won't buy them. People will knowingly continue to buy them because they are cheap. Last summer, I held my nose and bought a trio of 3tb Seagate drives to use for a Windows Storage Spaces array. It has parity, so if one dies I won't lose my data. Why did I buy them? Show me three more 3tb drives I can buy for less than $200 total, with tax. It was $187 out the door at Microcenter. I wanted WD, but could not justify spending 50% more.
MY theory on seagate is that their issue is not design, but QC. Essentially, too many bad apples get pushed out and not enough resources devoted to filtering out products that are faulty out the gate. So if you have a handful of drives that have survived 1 year, chances are they will be fine, as they probably would pass a rigorous QC.
Maybe, but I'm not sure. I suspect that a drive with a quality issue won't work at all. These seagates do work, for a while at least.