Hello

I saw a few days ago a member here saying that arahatship is impermanent. I was intrigued by what he meant by this, especialy knowing that there is at least one ancient buddhist school that held this view. In your experience, be it partial or full, what sense do you make of this idea? An enlightened being is dependent on his biology, but isn't it too extreme to say that arahatship is impermanent?

This is not intended as a debate, but as trying to make sense of a potentialy important insight.