I thought I asked this before, but it was either not accepted or I forgot to hit send (likely)
In the real world, especially sync, stems aren't tracks (and yes, I grew up recording when there were no stems, so I get it).
It appears Studio One doesn't export "true" stems. In practice I give a music supervisor the mixdown and the sound guys will want stems so they can remix etc. No, they don't want the tracks, either processed or not. They want for instance, guitars as a stem, drums as a stem, keys as a stem, percussion as a stem, vox as a stem, the only "track" I generally give is lead vocal.
These would be stereo of course, and the whole point of stems is fx should be rendered and just putting the stems in an empty project will give the exact same mix as the stereo master. Maybe I'm missing something, but S1 can't do that. If it can, I'll be happy.
Here is more on stems for those confused (like I was at first), and I realize many of you already know this, but many probably don't.