Is OP actually saying ps1 sold so well was because ppl were buying them to play their music on them? Wow.
And the whole ps2 dvd thing really only applied in the first year or so since there weren’t a whole lot of games to play after launch.
They both sold so well not because of “fads”, but because they had games no one else had. Gran turismo, MGS, FF, crash bandicoot, tomb raider, silent hill, tekken, and many more. PlayStation was seen as the “cool” or “hip” product to have.
PS3 only suffered so much because of the cell processor and blu Ray drive. It made it very hard to develop for and as a result, many third party games performed better on 360 and some were even exclusive to Microsoft’s box. Plus it made Sony have to charge $599 for it, despite still taking a loss on every unit sold. PS3 not selling up to PS1/PS2’s standards had very little to nothing to do with blu Ray.