Related Clues:

• Fade away
• Subside
• Cool off, as a fad
• Wither away
• Become extinct
• Become extinct, e.g.
• Go from endangered to extinct
• Fade
• Prove unsustainable
• Cease to exist
• Emulate the dodo
• Fade to nothing
• Go the way of the dinosaurs
• Expire one by one
• Gradually expire one by one