Recent in-service problems and development delays for high thrust engines suggest that we may be approaching limits on the thrust achievable. On the other hand, there seems to be growing interest in increasing the capacity of twin jets. If these factors collide, will there be a move back to three and four engine long-haul transports?
Is there a chance that A and B will find it profitable to resurrect A380 and B747 production lines in five or ten or twenty years time?