Not really. A shape like this makes your hands curl upwards when using the keyboard, so the tendons on the upper side of your hands are constantly in a tensioned position.
If you look at older thinkpads, (x300/301, x201 - x230, t410-t430), the keyboard was slightly recessed downwards or level with the palmrest, producing a flat typing surface, so the hands would rest on the palmrest in a slightly more relaxed position than the macbook conical shape.
Here’s some research on negative tilt angle keyboards:
The USB-C port for charging can be rather problematic, since this standard negotiates the charging parameters with the charger. It requires a chip on both sides, so simply delivering voltage to the pins won’t charge the device, and you won’t be able to use generic chargers that deliver proper voltage and amps. You’ll also run into issues of only one USB-C port being available for charging, displayport compatibility issues, and so on. Wacom has made this exact move in their Mobile Studio tablets, and a lot of users report this as having issues.
I’m writing this more as an anecdote. I imagine Purism does their marketing research well, and includes features that are a common denominator for the biggest part of their userbase.