Someone made this point in one of the weekly review threads, but I'm starting to feel like the showrunners didn't really think SAM through.
As a hologram, she effectively has superpowers compared to the other cadets. She can make herself incorporeal whenever she wants. She doesn't need food, or water, or air. She could survive temperatures the other cadets cannot. She could potentially walk through walls. The list goes on and on.
Yet, we've seen her do very little. In the opening episode, Darem decides to go outside in vacuum and risk his life, even though SAM presumably doesn't breathe. And in the most recent episode, she gets shot, damaging her matrix, even though we saw her turn herself incorporeal to avoid being shot just a few episodes ago as part of the game with the War College. She also seemed to be using life support built into her combat suit when she first went onboard for...something? Maybe she was just humoring them? I dunno. Ship life support in Trek never made much sense, since it instantaneously goes from instant death to fine (something real spaceships don't even do).
I did like how in the fifth episode Caleb was trying to play around with her holomatrix, even if it was mostly for gags. It seemed to imply at least that SAM has less control over herself than The Doctor did on VOY, which might explain why she seems to actively dress/undress rather than just poof change into the appropriate clothing. Still, the show seems to "forget" she operates under different parameters than the other cadets quite often.