That is the main reason I won't use them. Sure they may be rare, but they are often board and CPU fryers when it happens. I don't like that risk, and I live in a RV and move every 21 days, and have to disconnect and store the PC, so to me it's just not a good risk. But for someone with a PC just sitting in one spot besides cleaning, maybe it's fine. But I also think that relies on the competency of the user setting it up correctly, and firmly, to last.