i think if Jack was in control of Amiga it still would have fell behind the competition. Jack was all about "for the masses" which means he liked to get the computers out there as cheaply as possible. If you look at the C64 you can see a pattern. Sold a very large amount at a very low cost which meant Commodore made no profit. If Jack applied the same strategy to the Amiga it would never have made money so they wouldn't be able to do any R&D which was required at the time. Instead Jack would have preferred to use existing components off the shelf to save money. Which means no true innovation would occur. This strategy was OK for the era of the C64 but it would be a death sentence for the late 1980's and early 1990's. Commodore will still have gone bankrupt regardless of whether Jack was in charge or not.