The introduction of CDs was something of a disaster for the art of the album. I don't mean sound quality, although there probably is something to that. Nor am I talking about the fact that CDs were and are essentially computer software, making it inevitable that the computer savvy would eventually just loot the music. That's just a bad business decision. No, I'm just talking about overlength.
For good reason, you'll sometimes hear the complaint that 200-minute blockbuster movies seem to have three or four climaxes and endings. Some of us remember that movies are supposed to tell a story, and that to that end they should settle on one ending. But the filmmakers here (think horse by committee) are concerned with shooting a lot of footage, using it, and pleasing every sector of the market. If the result is incoherent, oh well.
Similarly, the music album is an art form developed in the decades after World War II. The final song should be a closing statement, something for the listener to deal with afterwards. Ending Revolver with "Tomorrow Never Knows" is a weird choice from a band that made several of them, but it's one you have to respect. A lot of albums from the CD era―probably peaking in the years 1995-2005―get to a nice closing point...and then just keep going. Hidden tracks and extra tracks are usually songs the artist didn't think were good enough for official inclusion on the album at all. Sometimes they're wrong, but not usually.
Worst are the alternate takes and remixes. In any decent comedy club, if the comedian said, "Now let me tell those jokes again, but pronounce some words differently," he'd be strung up.