Why did commodore went under?

[Megamig]

There are many reasons why Commodore failed here are my few:
 

• Lack of chipset updates. ECS is not even worth mentioning. No Paula update. No chipset support for high density floppies. AGA was released too late.
• Lack of professional software. Apple inc addressed this matter by setting up Claris. Commodore should have done the same or at the very least subsidised the development of professional packages such as Word Perfect.
• The Amiga 500 and 1200 were too expandable. The worst thing Commodore done was providing the A500 with a side connector that allowed pretty much anything available on their big box A2000 to be used on the A500.  Although the A1200 corrected this matter to some degree by replacing the side connector with a PCMCIA slot hardware developers got around this by using the A1200 trapdoor slot. The A600 trapdoor slot was a step in the right direction for commodore as it only allowed RAM expansion.
• The Amiga 2000. Oh dear. First it was a expanded A1000 then a A500 with a massive expansion board. Simply adding double the RAM was not enough. The Amiga 2000 never should have left Commodore without a 68020+ processor and on-board SCSI. As many will agree the A3000 was a big box Amiga done right!
• Releasing/developing the following junk

CDTV - Designed to be user friendly. This was hardly the case with terrible disc caddy system, old 1.3 ROMs and no in-built floppy drive (when all Amiga software to that date was released on floppy) made no sense

A600 / C65 - Desperate attempts by Commodore in reliving the  
C= 64 era

• Many more issues such as: poor marketing, lack of licensing the Amiga chipset to third party developers, not working with enemy Atari to bring down costs (by sharing components) and not moving to generic PC parts such as keyboards ultimately cost Commodore their business.

[Megamig]

What? Too expandable? The expansions they had were too expensive (more specifically the A500) and non-standard. No game developer (well, most wouldn't) would develop for anything other than Kick 1.3 and 1M RAM because it was all most users had. I'm considering the possibility that the pseudo-closed A500 (although it was the best seller) was also what killed the Amiga in the long term. No video upgrades (DCTV and HAM-E, while kual, don't count). Every PC had a video card which was upgradable, but the Amiga line, you had OCS. (Eventually AGA, but only for a percentage of the users. The upgrade was to buy a new computer..)

I might have been misunderstood. I was reflecting that a A500/A1200 can be upgraded to specifications that exceed those standard in big box Amigas (such as CPUs). If the A500/A1200 were aimed at the low end market they should have been engineered not to be upgraded apart from limited memory (no more than 2-4mb Fast) and kickstart ROMs.
 
As for bad products, do not forget the Commodore 128 - which apparently cost almost as much as manufacturing an Amiga 500. Why Commodore ever bothered with the C=128 is beyond me. Especially when the LCD would have opened a new market.
 
IMHO the C= 128 really should have been a Commodore 64 motherboard modified with a internal 64K REU, reset button, numeric pad and a burst mode serial port. The whole CP/M and other trash was not necessary once Commodore aquired the Amiga. Additionally launching the Amiga 1000 the same year as the C=128 lacked focus. No wonder people were confused. What was the future in 1985? 8-bit or 16-bit computers!