Depends in the genre and artists, some music fits into separate songs where albums are merely a collection, some is created for an album as the primary artform,

Depends in the genre and artists, some music fits into separate songs where albums are merely a collection, some is created for an album as the primary artform, with a narrative, themes (in a musical and literary sense) and story. Think about it as an opera. Of course, Nessum Dorma sounds great by itself, but wouldn't it hit different if you hear it in the context of the whole story, with emotional buildup and everything?