> I guess it depends on your definition of "quickly", or it would be good to see a citation on this one.

A citation in your favor would be how net energy output only slowly declines as EROI plummets[1]. Slow decline is a general property of these types ”Seneca Cliffs”[2] present in collapse.

[1] https://www.resilience.org/stories/2019-03-12/the-real-energ...

[2] https://cassandralegacy.blogspot.com/2011/08/seneca-effect-o...