usually "mode promotion" in general in AmigaOS was used for the dblNTSC and dblPAL modes, which was captializing on AGA to do 31khz versions of 15.x khz screens. This wasn't around pre 3.0 or pre AGA.
The others - modepro and NewMode or whatever attempted to promote wb-compliant applications to an arbitrary screenmode, be it planar or gfxcard, whatever you have defined.
