You can measure my productivity by how slouched I am. Sitting up straight at my desk, chair locked, perfect posture? I’m doing nothing, maybe looking through System Preferences to change the system highlight color. Sliding down in my chair like jelly, with my shoulders where my butt should be and my head resting on the lumbar support? I’m building the next iPhone and it’ll be done by 2 AM.
Funny, I’m the same. I also like taking walks to think but I’ve found that I must have my head pointing almost directly down (I.e. looking at my feet). It’s also how I stand thinking in the shower, with the warm water hitting my angled neck. Maybe something beneficial about that position of the neck, or maybe just habit! I will also have conversations in my head during my walk, I’ve done this my whole life and I’m no…
As for the software. I would not want a camera on 24/7 (on any device, a compromise being my doorbell, which isn't cloud connected). It'd defeat the small LED which informs you it is on (since it is always-on), and if the machine is compromised this is a method to receive personal data.
Actually, I'd prefer a hardware killswitch on things like camera and microphone.