One thing that struck me from the tests was how neutral the over and under exposures are. That's absolutely not the case on most other cameras, and I speak from experience here because I have routinely exposed things poorly in the past and then suffered in post when things didn't behave how I anticipated/hoped they would!
Once again, the cameras that most remind me of this trait is the original BMPCC and BMMCC, which use very little highlight rolloff, so the way you use them is to ETTR and pull things down in post, and they look very similar (I did tests), at least when overexposing things anyway, if things are underexposed then the results aren't so good.
It might even be that the usability of the DR of the Alexa is more useful than the sheer amount of it.