Most of the studios Sony bought were “2nd party” - i.e. they predominantly made games only for PlayStation. The effect on competing consoles was minimal - their

Most of the studios Sony bought were “2nd party” - i.e. they predominantly made games only for PlayStation. The effect on competing consoles was minimal - their game never made it to non-Sony consoles anyway; this was a different era where porting games was very painful since the hardware can vary radically between consoles.