@Skyrunner
The biggest flaw with the A1200 was that it came with a 68ec020 instead of an '030. Maxis quit developing for Amiga after their crappy port of SimCity 2000 couldn't keep up with the Mac version.
In the end the second-biggest shortcoming (the lack of fast RAM) made people buy accelerator boards with newer memory than was available when the A1200 was developed, thus allowing the A1200s to last longer than their PC counterparts.