Could it simply be a case of the MSX scene being much bigger?
Probably, the 8-bit scene (Atari, Spectrum, C64, MSX and others) has been a lot more fun and interesting than the Amiga scene over the last couple of years and it's still growing. They all have game and demo contests, lots of interesting hardware projects and they don't fight among each other. People just have fun with their old hardware and software.
8-bit power forever