Keep going with your experiments Caleb! I do not think any of us choose to push colour transparency film, but sometimes it's unavoidable.
I do medium format stereo, and you HAVE to shoot at f/16 or f/22 to get everything in focus (in stereo, everything has to be in focus, totally different from normal 2D photos). On a sunny day in summer in Ireland (i.e. not so strong sun, 53deg N), ISO100 translates to around 1/60 at f/16, perhaps 1/80 or even "sunny 16" 1/100 if its really strong sun. So, if you want to do handheld work at 1/60 or faster, you have to wait for the sun to come out! If it's hazy sun, I still shoot ISO100 film at 1/60 @ f/16, and then push it one stop. If it's just a bright day with light clouds, or a darker subject, I might have to push two stops. Of course there is no scanning, you view the stereo slide pair in an optical viewer. Most of the time I shoot in sunny conditions, but just occasionally have to shoot in hazy sun or light cloud ... and the ONLY option is to push the film.
A long post, but I want to explain why it's important to know how far Ektachrome 100 or Provia 100f can be pushed, at least for MF stereo work. I know I can push Provia 100f one stop with little or no obvious degradation of the colour gamut or dynamic range, at least compared to all the other things that matter like good (stereo) composition and an interesting subject.