It wasn't the Amiga 3000 that killed the Amiga. It was the fact that the Amiga 3000 didn't have AGA or AAA that killed the Amiga.
Technically, it was the CD32 that killed Commodore but it was only the straw that broke the camel's back.
... or a DSP.
The developers were forbidden by non-technical management to use the DSP-enabled boards they already had.
Likewise, entire already designed chipsets like Ranger were discarded just like that, on management whims.
Comparisons. In October 1990.
For $3999, you had the Amiga 3000 with 640x512x16colors. It did have a '030 25Mhz, 40mb Hard drive and 2mb. Monitor was extra.
For $3860, you could get a 386/33, 4mb, 512k SVGA (800x600 8bit), 160MB Hard drive AND you got the 14" Monitor.