alt Hacker News"Incoherent" has a static connotation, "decoherent" OTOH is dynamic and has an associated verb, which is very handy when describing a gradual process which (almost) inevitably occurs as features are added to a system. Since confusion with the usage from quantum physics is unlikely, I too think we can safely and fittingly overload the term like the article does.
Yes, this is the thinking behind using the term. It’s also different from incoherence because decoherent systems can still make sense in some ways. They still work, they can still be iterated upon.
They are decoherent because the work to change them is extremely difficult. This is a different, and much more costly, state to exist within.