I wonder what would have happened if SAF had come out in 2009 - in a position of strength and able to affect the Glazers attempts to grow the commercial brand - after the Ronaldo sale and the refusal of the team to properly recruit given the debt, and just openly said that the Glazers needed to sell if they weren't able to maintain the club properly and that their model was jeopardizing the club's competitiveness. It's pretty clearly he wouldn't have under almost any circumstances (whether through potential legal ramifications or through guilty conscience after ROG, or both), but, of all the hypotheticals or hinge points, maybe that might have been one.
I don't think the ramifications were quite as clear in 2005, even amongst the protests and green and gold and journo reports, and there was this assurance that they would grow the revenue so quickly that the debt could be easily serviced and brought down speedily, but 09 was definitely a red flag (particularly in light of the collapse of the larger asset-debt based model in 08, before that all got artificially inflated/ignored, as opposed to the wider belief that business practices were just always rational and costed which was floating round publically in 2005, but that's another discussion)...