[dfox]

Running the whole DBMS as a bunch of threads in single process changes how fast is the recovery from some kind of temporary inconsistency. In the ideal world, this should not happen, but in reality it does and you do not want to bring the whole thing down because of some superficial data corruption.

On the other hand, all cases of fixable corrupted data in PostgreSQL I have seen were result of somebody doing something totally dumb (rsyncing live cluster, even between architectures), while on InnoDB it seems to happen somewhat randomly without any obvious reason of somebody doing stupid things.