...the question boils down to were there early SuperDrives that could burn single-layer DVDs, but not dual-layer DVDs?
The capabilities of DVD burning mechanisms only gradually developed, as did their availability in Macs (see e.g.,
Mactracker). The original G4 iBook only had a Combo drive; no DVD burning. The next two models added a Super drive option (-R/W burning only), while the final model (Rita's) added the option to burn to +R/W blanks.
The double layer burning capability was never available in G4 iBook models, but was only added in the second MacBook (Intel) model. Despite these differences, all (CD/)DVD burning mechanisms were called 'Super'drive by Apple.
