VST FX, sure why not.

VST instrument is a different beast. A lot of real tracks have their Midi counterparts that are loaded at the same time. You can chop away RT, leaving just MIDI and re-voice it with VST instrument of your choice. For example, I use several RT's that I like, but I either used them too many times, or simply don't like that particular sound. So, I would get rid of RT and use that midi with other Virtual instrument(s)