For professional use the current “elevation export” options are basically useless. The exported geotiffs do not contain the actual elevation data. Since the colour values are interpolated between the lowest and highest point, the exported images are just pretty images.
There needs to be a way to export the actual X Y Z data for import into common GIS applications like QGIS. Possible formats are GeoTIFF, Surfer Grid Files or raw XYZ tables.
Most common is GeoTIFF, where the grayscale color values are the actual elevation data.