Sultan,
If the 76D has a 4 year delay, and that means to you some major problems with the design, then what does a 20 year delay in the 609 signify - a completely bankrupt design concept?
I suspect that both cases more rightly reflect the variability of continued funding in a self-funded R&D world. Nothing to do, in either case, with the engineering successes of the development team.
Why, when your own track record is so abysmal, do you throw rocks at another team?
Rocky