Where did I question his credibility? I questioned his technical knowledge. And he accepting there is a considerable gap on the I/O is one thing he can do without much technical knowledge, but assuming that would just make loading times different and nothing else is due to lack of knowledge. We have most devs saying it is much more profound than this.
Questioning his technical knowledge is questioning his credibility, because what value do his statements have when it seems that he doesn't know what he is talking about to begin with?
But virtually all of this is moot anyway. Third party developers aren't going to go through the trouble of building their games for the PS5's SSD and then retooling them all to make them work on other platforms.