The chips Amiga engineers had in planning for the next generation had promise but the research money wasn't there.
The ironic part is that many Amiga users were encouraged to move to the Macintosh as being more similar in operation;now they will be moving again.
Standardization has its uses but I like for there to be alternate choices just so the standards don't grow stagnant.
The 4000 was the last Amiga still in production... but the 1200 which was based on some of the chips developed for the 4000 was the last introduced.
The A4000/060 was released far after Commodore went bankrupt and was broken up and sold at auction. It was assembled out of parts left over in inventory by a third party.