I mean remember the 80mm MKII? I asked my dealer how many he sold last year (2, one to me) - is one of the biggest dealers in Germany. Seeing this, why would they invest anymore R&D in say a revision of the 55mm which is their worst optic in the XF line? Precisely, no reason.
The reason why the evolution stopped is because some people looked at the business unit and said we stop putting money into it and focus on where the big bucks are ... selling repro stations for 70k, for example ... or dual camera arrays for aerial applications. Don't want to know the list price, but wouldn't be surprised if it is near 200k.