AGA quadrupled bitplane DMA bandwidth by doubling the data path to 32 bit and doubling the clock speed, hence the new DMA address generator (Alice) and bitplane data serializer (Lisa). Unfortunately the opportunity was missed to utilize the added bandwidth for speed up of the blitter or floppy DMA (for high density). The blitter is still 16 bit and got no speedup at all, apart from the overall DMA slots saved due to bitplane speedup - that's why a 32 bit CPU can achieve a higher fillrate than the AGA blitter.
