The AR7210 was based on licenced BeastX technology which meant that Spektrum werent able to develop it. Spektrum wanted a FBL that would integrate with their new Smart ESC range and offer full programming and telemetry interface with their transmitters, similar to the Mikado Vcontrol. BeastX based technology was never going to offer this so they decided to develop their own FBL. The Spektrum 6250HX as fitted to their Fusion 360 is the FBL that they are going to replace the AR7210 with.