Some albums don't have a silent pause between tracks. For studio albums, that's mostly a bunch of prog metal concept albums. For live albums, that's pretty much all of them. Without gapless, this will happen:
Live : "thank you! *clap *clap *clap *cheer ... SILENCE ... *cheer *clap *clap alright, this next song..."
Concept album : "guitar riff, maybe a voice over/lyrics ... (SILENCE) ...continuation of lyrics/voice over, guitar riff"
That's, at a minimum, annoying, mostly because "Hi-Fi" includes that fact that people aren't just going to stop clapping like that. Or for Mephistopheles and a guitarist to stop what they're doing for two seconds and start right up where they stopped two seconds ago.