Audio recording in camera is a modern reality. A fair amount of production work relies on this, which is why these cameras DO include audio (unlike the original Bolex or Arris). Expecting a documentary, or run and gun shooter to settle on inferior audio while upgrading the picture leaps and bounds reflects on a lack of production experience. Anyone who has ever attended a film market can also testify that quality audio is everything, and it's often more important than clean picture.
Yes, in a perfect world you should employ a sound mixer AND a boom operator....and you should be feeding them, alongside your focus puller, and camera operator....but in this day and age, people pull their own focus, and hand hold themselves....and yes, they set rough audio levels too....that's life. The days of double system and shooting entirely on Prime Lenses aren't gone, but they are a luxury, that's overkill in many cases, thanks due to the available technology. The technology is available!!! Why cripple the product!? Attaching a mini recorder, or XLR convertor just to record audio is akin to expecting someone to attach a video light to get an exposure, and thinking low light isn't important, because you should be using real lights.
The technology exists to partner with companies who specialize in such engineering. We're talking about a camera with an on-board battery. Certainly clean on board audio recording must be a priority.
The form factor of this Bolex is a little Fisher Price Pixelvision for some reason, but I'm confused why anyone would want it box shaped instead. Cinema cameras like the Eclair, Arri, and Bolex were never box shaped, in part because of how they needed to be balanced. The pronounced back end should be more ergonomic for a heavy lens.