I have been a user since May 2005 and find this php only stuff very sad I would find it difficult to justify moving from asp to php as I have a very heavy asp development investment and many years experience. I think you are also missing out on a large number of developers cast adrift by the abandonment of the interakt products by Adobe.
How many of the investments I have made with you will become unusable by me as they are updated? I have:
Digital File Pro 1
Dynamic Web Charts
ProMaps for Google
I guess the first of these was the Digital File Pro 2 update which lost asp support.