I agree. Some games (GTA) are losing the original music due expires music licenses and it totally changes the character and feel of the game. Thank good for people archiving these games.
The re-release is technically a different game, so it might require another music license, so it might not have the same soundtrack, it changes the feel of the game.
The old console has its time ticking.
Without emulators, that game experience won't be preserved, its simply at the whims of executives which don't really care enough about such small details for re-releases because the name of the game is usually enough to make some bucks.
Sad that the steam version has no none of the original.