[_jal]

I run ECC everywhere possible. I know of two instances when it mattered (detected a failing chip), and suspect it was correcting single-bit errors for a while before that in those cases. I've also resurrected someone's laptop by determining it failed due to bad RAM and replacing that. (Easy enough diagnosis - intermittent, random-seeming hard-lockups and corrupted data on disk.)

ECC also thwarts Rowhammer and similar attacks, if that matters to you.

Note that it isn't enough for AMD to restore ECC support in consumer kit; you also need motherboard support, and the MB makers are also complicit in raising ECC costs.