Refresh my memory, wasn't the 990 discontinued because the manufacturer couldn't get certain parts?

So the original manufacturer produced the 950 & 1050. I would assume those products were considered successful.
Another manufacturer for the 990, also successful but after a time couldn't continue production do to lack of components. (Poor planning on someones part)
Continue with that same company for the 997 (debacle)
Move to yet another company for the 978 (giant debacle)

See a trend?