There is a path of retreat from belief in sudden FOOM, that still calls for working on FAI (no matter what is feasible, we still need to preserve human value as effectively as possible, and FAI is pretty much this project, FOOM or not):
Relevance of intelligence explosion
There is a path of retreat from belief in sudden FOOM, that still calls for working on FAI (no matter what is feasible, we still need to preserve human value as effectively as possible, and FAI is pretty much this project, FOOM or not):
Relevance of intelligence explosion