If they drop XML it's going to present a LOT of problems for everybody including developers. Anything with XML gauges for example, is not going to work and will probably crash. Our Cessna for example uses an XML autopilot so we have to change. There are add-ons out there (payware) that use XML gauges and they will have to be changed. Although the work is a bit of a headache I am more annoyed at the fact that we were given no prior notice by the developers. So much for co-operation being a two-way road.