That standard has been withdrawn and revised by ISO 9241-302, 303, 305 and 307:2008 standards.
I have had many monitors, low and high end, and a few LCD/LED tvs over the course of the last decade and NEVER had a single monitor with dead pixels even after 7+yrs. It seems quite reasonable to expect panels used in high end monitors to be free from pixel defects. Sure, if it's a large 4k tv which is usually viewed from a distance a few dead/stuck pixels can be acceptable. However, monitors are viewed from a close distance and given the pixel density of monitors like the PG329Q, any pixel defect is easily noticeable.
Frankly, the reference to ISO standard seems like an excuse to use defective panels on monitors and selling them off as high end products - something I'm sure most people wouldn't accept.
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