Hi, this article is still very interesting in 2016
I am by no means a pro or even a programmer, and I'm aware that personnal experience may have not much value compared to wide scale tests.
But here is what happened to me last year.
I own an Acer consumer laptop with 2x8Gb Kingston modules, I7-4702MQ. Pretty crappy on the power supply side by the way, but that's not the point.
I had never bothered to think of what benefit ECC could bring.
One day, I did a full system wipe and copied back all my files to the internal hdd (getting it partitionned more conveniently in the process).
All went fine... Apparently. I soon noticed corruption on some frames in many of my videos.
The culprit was one of the ram modules. But the only affected files were bigger than 1Gb. Reproduced the problem with Teracopy, it would happen 1/3 of the time, by copying over and back a big film to my external drive with integrity check.
The memory modules worked fine one by one, and even both in the opposite slots. The MB was failing ? No.
Back in their slots, problem back. 24 hours memtest86 went all clear, but the files were still damaged while copying.
I then cleaned the slots with a brush and compressed air, and voilà ! Even being very cautious with my laptop, dust and moisture had made me loose two days troubleshooting.
The sfc scan reported large corruption as well.
After that day, my computer still works fine one year later, but I do consider buying ECC ram capable rig to avoid damaging part of the backup (including many family films that I consider valuable). And I do periodic integrity checks on my backup external drive now.
Thankfully the damaged videos are just on a few frames and still watchable, but many of them are damaged. So even a careful noob with standard consumer use may run into such issues.
Sorry for the tl ; dr effect xD