No, its because they needed to use an ultraslim model (slimmer than the ones in the PPC laptops and in the Mac mini). No-one makes a DL version in that form-factor.
It's because DL blanks are so expensive, Apple decided it wouldn't be a good idea to release a product that depended on expensive third-party parts that nobody could get. Like Firewire 800.
For example, on the new MacBook they also went with the new, higher performance ExpressCard/34 slot, instead of the old PCMCIA slot technology. The ExpressCard/34 is part of the current standard PCI-e architecture, and it depends on...
No, its because they needed to use an ultraslim model (slimmer than the ones in the PPC laptops and in the Mac mini). No-one makes a DL version in that form-factor.
17-inch PowerBook G4 was 1" thick and has DL capability. I understand MB Pro is a hair thinner than 17-inch PB, but I think Apple could've spared a hair for DL.