What's an acceptable failure rate?
I still find a little value in the griping that goes on, because at the root of the question is what is the failure rate or average lifespan. Griping is the only thing that comes close to this. But to have a rate or lifespan, you have to compare it to it's success rate. So popularity/sales volume/usage rates all come into play.
But, I wouldn't let failure rate scare me from buying any firearm from a major manufacturer. The rates are so low that they are acceptable to me. Exceptions might be new models, and then failures are taken care of. It just costs you time, frustration, hassle, money. But chances are that it'll fail at the range, not the street because 99.99 % of the rounds are fired there.
If guns and ammo weren't so expensive and have such long life spans better studies could be done. They aren't largely because the rate is so low/life is so long.
Let's quit this subject and all agree to start our own tests on our own guns. I'll meet you all back here after you have put 75,000 rounds downrange!