It's fairly simple, albeit not what customer expects, I guess - because it's profitable.
If they wanted to sell premium screens @ class 1, they'd have to throw like 30-40% screens to the garbage bin. That would mean no bad pixels (unless they appeared after QC, but that's... rare), good screen uniformity, etc.
But that 30-40% is a hefty loss and a typical consumer doesn't give a rat's ass about whether the product has dead pixels or not.
We're a group of enthusiasts/OCD-ers that care, but we're a minority. We're not worth the money they lose on thrashing crappy, but still sellable panels.
Also, it doesn't help that in some cases, different brands (Acer, Asus, AUO, for instance) use the same AU Optrionics (which is Acer's, by the way) screens, notorious for terrible QC and frequent faults.
A solution is to pick a good screen (sadly, thorugh a panel lottery) that we're expect to keep for a couple years, and stick with it. If you're a kind of customer that likes to change screens every year, you're bound to suffer more.
If they wanted to sell premium screens @ class 1, they'd have to throw like 30-40% screens to the garbage bin. That would mean no bad pixels (unless they appeared after QC, but that's... rare), good screen uniformity, etc.
But that 30-40% is a hefty loss and a typical consumer doesn't give a rat's ass about whether the product has dead pixels or not.
We're a group of enthusiasts/OCD-ers that care, but we're a minority. We're not worth the money they lose on thrashing crappy, but still sellable panels.
Also, it doesn't help that in some cases, different brands (Acer, Asus, AUO, for instance) use the same AU Optrionics (which is Acer's, by the way) screens, notorious for terrible QC and frequent faults.
A solution is to pick a good screen (sadly, thorugh a panel lottery) that we're expect to keep for a couple years, and stick with it. If you're a kind of customer that likes to change screens every year, you're bound to suffer more.