BluRay neither saved the PS3 or was a strong advantage.
That would be like wanting credit for saving someone's life because you untied them from a railroad track right before they were to be hit by an oncoming train when you tied them to the track in the first place. Or wanting kudos because you allowed me to take you to the prom when you lied to my preferred potential date by telling her I had herpes. LOL
BluRay strongly contributed to PS3's high price at launch while inhibiting Sony's ability to recoup the cost of providing millions of PS3 to the market.
Without BluRay, the PS3 would have been cheaper to manufacture, came with a cheaper price tag and sold better among gamers. The guys that buy content that actually pays license fees to Sony.