Atari and Commodore died, leaving Europe open for the taking.Then SEGA panicked and rushed out a console. Then SEGA lost the head of SEGA of America and later the president of SEGA. Leadership went into chaos. Meanwhile, Nintendo took a long while to get the N64 out and Gunpei Yokoi quit and went to Bandai before ultimately dying, leaving Bandai without much of a plan.Sony had a gigantic focused marketing budget and almost no competition.
And the Playstation dropped in price quite fast and it was a CD player as well. A much better deal for people to buy rather than buying a seperate CD player.