It it should be 'dead and buried' by now then why does it persist ?
It seems that there are enough people that share these experiences (not necessarily your own) to stop that from happening.
My own take is that it is getting better, but it isn't there yet.
One thing that I personally don't understand at all is why the industry did not long ago standardize on ECC RAM, the cost would have been marginal (due to the increase in volume) and the potential benefits in perceived stability would be huge.
Servers have it pretty much as a standard, any bit flipped in critical RAM can cause an OS crash (both for Linux and for Windows, RAM failures are OS agnostic).