Dead meaning that, in my opinion, they have sold their soul to Satan. Boeing was previously at the apex of engineering. The 747 was a respectable achievement in 1968. The MAX debacle has exposed a catastrophic fall in engineering standards.
With Boeing trashing its reputation and Airbus sitting on an enormous backlog I can envisage Chinese airliners making inroads in Africa and Asia. But to do so they need to make solid, dependable products; they can't scrimp or cut corners in pursuit of short-term profit.