A small percentage of software made use of the REUs. Like other add-on products from Commodore, their relatively small installed base relative to the huge number of C64s & C128s made software developers hesitant to invest much time and effort in supporting REUs. The lack of commercial support kept sales lower than they otherwise might have been. Due to its high speed relative to Commodore's floppy drives or even the commercially available hard drives, REUs did see support in the Commodore BBS community. Programs such as Color64 required a REU to minimize load times when switching between sections of the BBS.