I’m highly obsessive about taking care of my CDs, and rarely have had one go bad unless it was defective “out of the box” – the only one I can think of is Dream Theater’s Awake, which developed a skip that only showed up on my CD-ROM drive, on all other players it played fine. Still, I replaced it.
I also replaced my copies of Tool’s Undertow and Dream Theater’s When Day and Dream Unite (the rare Mechanix version, grrr…) before realizing it was my CD player that was defective.
As for “upgrading” CD’s to remastered/bonus tracks versions, well, there’s a lot. The ones I can think of:
Anthrax “Stomp 422”
Black Sabbath s/t (had 2 versions with different tracklist; the remastered version replaced both)
Deep Purple “Perfect Strangers”, “The Book of Taliesyn”, “Made in Japan”
Depeche Mode “Black Celebration” (still have both copies)
ELP “Black Moon”, “In the Hot Seat”
Emerson, Lake & Powell s/t
Genesis “Three Sides Live” (still have both copies)
Holy Terror “Mind Wars” (replaced with a 2CD containing both their albums; however, the new “Mind Wars” disc was defective, and after returning it 3 times I realized it was a mastering defect. So I kept my original Combat pressing of “Mind Wars” and sold the new defective one to the used CD store. Last I checked, it’s still there.)
Iron Maiden “Killers”, “Live After Death”, “Fear of the Dark”
Jethro Tull “Aqualung”, “Thick as a Brick”
Judas Priest “Unleashed in the East” (the import version is called “Priest in the East”)
Led Zeppelin “Houses of the Holy”, “Physical Graffiti”
Metallica s/t (3 copies - upgraded to the import/bonus track edition many years ago, then sold it in a fit of pique after the whole Napster debacle. A friend “donated” a regular copy to fill my collection so I wouldn’t have to download it. )
Motorhead “Iron Fist”, “No Remorse”
Possessed “Beyond the Gates”
Rainbow “Finyl Vinyl”
Savatage “Sirens”
Slayer “Reign in Blood”, “Diabolus in Musica” (that last one was a mistake)
tribute: “Masters of Misery: Tribute to Black Sabbath” (still have both versions)
W.A.S.P. s/t, “The Headless Children”
Yes “Tales from Topographic Oceans”, “Union”
As for vinyl → CD upgrades, don’t get me started, there’s at least 500 or so…