Probably this doesn't go on for infinity, as being CEO of a Product and Foundry company is likely untenable, which is why they have never found an external hire for the job.
There is no real internal bench to pick from, as demonstrated by choosing D-mb and D-mber to be 'co-ceos'. Few companies of this size would even want David to be CFO, as he is incompetent.
Breakup seems the only solution, then let product divisions merge with a few successful companies, and Foundry either is an IPO or maybe merges with a company which has management capability to actually run a foundry.
The combined companies could be called Global-tel Foundries, or Samsung-tel.