Indicates an unexpected or abrupt failure, like a venture going bad suddenly.

Sudden Failure

Used when failure is clearly seen or noticed by others, not hidden or private.

Visibly Unsuccessful

It's a figurative expression and shouldn’t be taken literally; no one actually dies.

Applies when something stops being liked or favored by people.

Describes a decline, which may be rapid or gradual, but it's a process over time.

Understand that the phrase personifies ideas or trends as if they can 'die'.