While I never owned a Commodore 64 like everyone else, I did have one of these in the early Eighties.
The Tandy MC-10 micro color computer was not a commercial success. Tandy did not support this machine. In Basic you could only use 8 color and a graphic resolution of 64x32 dots. However, the MC-10 had much more capabilities: 2 color 256x192 graphics, 4 color 128x192 graphics and the sound-chip had synthesizer possibilities. If all these extra functions were mentioned in the manual, I bet that these machine would have sold many more.