There were once drives of 32x CD-R and 10x CD-RW.
For example, the LG GCC-4320B has the following writing speeds.
http://www.cdrlabs.com/reviews/index.php?reviewid=145
32x CD-R
10x CD-RW
And reads CD-ROM at 40x and reads DVD-ROM at 16x.
Most media manufacturers and drive manufacturers are switching to 16x DVD writables, but not 8x to 16x DVD+RW/-RW. Even though most CD-R or combo drives on the market today can write CD-R at 52x max and CD-RW at 32x max, one is likely to use the drives with 52x CD-R media and 4-12x CD-RW media as 24-32x CD-RW media are hard to find.
http://www.rima.com/Merchant2/merchant. ... y_Code=CM1
52x CD-R writing is about as fast as 6x DVD+R writing speed. 10x CD-RW writing is about as fast as 1x DVD-RW writing speed. We are luckier now than before to use 4x DVD+RW media.
Will the cost to develop and mass-produce 8x DVD+RWa and 8x DVD-RW media be justified by enough demand? I guess not since most people don't even buy more than 10 DVD+RW and DVD-RW disks. Look at this:
http://www.rima.com/Merchant2/merchant. ... y_Code=DVW
DVD+RW 2.4x and 4x media are not that expensive. If one rewrites the disks even just 10 times, it's worth to spend 2x the money. Even then, the DVD+RW media market is very small. Annually, 6 billion or so CD-R media are sold. Try to guess how many DVD+RW media are sold. It's just millions in a month which means less than one million for each of the most manufacturers, probably the only exception being Ritek. Now compare that with Blu-ray rewritable disks. Ritek can earn more profits from Blu-ray than DVD+RW because Blu-ray costs 20x more. Order 1,000 4x DVD+RW disks if you want to see DVD+RW 8x, if ever.
