This article pulls a sleight of hand in which it tries to have states which are "invalid" and yet which are in fact properly handled - and so there's no reasonable sense in which they were in fact invalid. So it's just an appeal to think harder when designing a system.

A state enumeration becomes just free text, a count becomes just a number, and too bad now it's impossible to reason about the state of the system because everything is unknowable. Why is this app at the top of every chart? Oh, it has recorded negative one billion users and its state is just the URL of the app store, which causes mayhem in the scoring sub-routine.