Computer dealers disliked Commodore's usual practice of introducing new computers incompatible with existing ones. Steve Leininger, the designer of the Tandy TRS-80 Model I, said in July 1984 that the new computer's incompatibility with C64 software "makes you wonder". He added "It's a little on the spooky side", unfavorably comparing the Plus/4 to the Apple IIc's compatibility with the tens of thousands of Apple II software packages. Unlike the C64's VIC II, the TED had no sprite capability, which strongly limited its video game graphics capabilities. Also, its tone generator was much closer to the VIC in quality than to the C64's SID, which, again, made the Plus/4 less attractive to game developers. Finally, the lack of these capabilities made C64 software compatibility impossible. Commodore may not have believed this to be a problem, as the successful C64 was incompatible with most VIC-20 software but the C64 had developed a large software library by 1984, and while the C64 was a significant upgrade to the VIC-20 in almost every way, the Plus/4 was not equally more capable than the C64.