What about the MSX or Atari 8-bits? Or even the sega 8-bit computers? just because the CPC was big in France doesn't mean it was popular in the rest of the world, same argument for the Spectrum in the UK and eastern Europe. Whereas the c64 was pretty much universally popular except for Asia where the MSX was king.
The CPC might have had some nice games but many games were ports from other systems and came with the limitations of those systems, shame more games weren't made for the CPC to take advantage of its hardware.