Lessons to be learned or refreshed in ones' mind from this, as is usually the case.
Eventually, every pilot is quite likely to face a similar situation to the events leading up to this accident.
My personal lesson is to continue to remind myself to always be mentally prepared to call it a night (or day) if it gets too silly. To climb and divert to an instrument approach elsewhere, however inconvenient it may seem. Don't get forced into a corner.