What Happened to The REFLECTIONS Reverb Engine?

The original BigSky had a reverb engine called REFLECTIONS which is not present on BigSkyMX. This is because the reverb type was designed to put you in virtual rooms we created for the original BigSky. The function of this reverb has been replaced by using IRs from real rooms and locations, and so it made much more sense to replace it with the IMPULSE reverb engine, allowing use of these IRs.