Originally Posted by
DeltaboundRedux
That was an interesting thing to Google. Never even heard of the SpaceJet.
Wikipedia (a solid source, indeed) suggests the plane itself was more or less on track but there were litigation headaches with Bombardier.
The MRJ was dead on arrival because Mitsubishi gambled on scope changes, and they lost. There was no path to a sub 86k lb model with the airframe and engine combination.