There have to be at least some of those people who are exaggerating or are OCD, but I'm sure there are still plenty of sequential failures that are totally legit.
It's actually not that improbable that a number of people suffer sequential failures. If your sample size is large enough, odds are it'll happen to a surprising number of people. There are no shortage of people who have won the lottery multiple times and some even on the same day. That's what the conversation about anecdotal evidence and research methods up above was about. Normal people will overestimate the odds of something happening if it's dramatic enough.
It's also possible that there were bad batches which would greatly increase the odds of someone getting sequential lemons if they were getting the units from the same store, or even the same distributor, or same region.
Some of the sequential failures were after topcase repairs. That presents at least a couple of problems. First, there may have been other factors in that unit that caused a keyboard failure and merely replacing the keyboard alone isn't going to fix anything. Second, anything that's been repaired is at a greater risk of failure. Any repair is risky. I'm sure some of them weren't done right.
I believe most of the stories of people who are having terrible experiences, but I also believe that MacRumors is an echo chamber that is driving people to overreact on limited information that even when true, might be more complicated than what you see on the surface.
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Remind me to never let you so much as breathe on anything electronic that I own!
For sure.
To be totally clear, I’m not suggesting that someone had multiple failures and therefore all MBPros are crap. Let’s not add 2+2 and get 499. I’m just suggesting that it (one person with several failed devices) is a more indicative statistic than “279 people created posts for reported failures”.