Reaper, Studio one, Cakewalk, Logic, Protools, Cubase, you name it, none of these can generate and regenerate and add RT/RDs without the aid of the Biab plugin.
Where these guys/girls are coming from, is they don't want the audio "locked in stone" tracks, they want to change chords/key instantly on all the extra tracks.
As I said the "old users/hardware" notion is is preventing this.
See the DAWs in the quote, they would all play from the source files that are sliced up, pitched and stretched.
They would all play 14 RTs from the source files in your RealTracks folder that have been sliced, pitched and stretched in the DAW.