Hurry and jump from the 80 minute frying pan into the 90 minute fire. The maximum capacity of a disc that fully conforms to the Orange Book standard is 74 minutes. Higher capacities require a forgiving write or read drive. Some drives tolerate defects but many do not. Program area diameters must be between 50 mm and 116 mm.
Adequate margins absorb normal manufacturing variations.
Not only are these values outside specified limits, production variations make the situation even worse. The result is unpredictable write and read quality. 90 minute discs have nominal track pitch and scanning velocity values that are significantly outside specified limits. Because there are no drive standards, discs that work in some drives can fail in others. If the disc conforms to media standards, then the drive is at fault when failure occurs.