My dad had various Plant Manager and Production Superintendent roles at Goodyear for many years. He could tell you exactly how each machine the factory operated, and why, and what the functional tradeoffs were of different designs. He had a Master’s in engineering, which again is a common path to this sort of role even in tech — join as a capable engineer, learn the product and industry, and somewhere along the way learn that you have either talent or interest in management or communication.
No response, and I'm pretty sure I'm on their "this guy is a crank" list now.
Real Product companies tends to take these things seriously. Or at least try to explain these sort of things.
But that is only limited to small -medium , family ran or private companies. Once you get into large public companies there are things that can not be said without first clearing with legal.
What impresses me the most about this is the quality of triage required to pass just the questions that really need it on to the engineers to avoid oversaturating their bandwidth. I got connected to them almost immediately.
But I'm also 100% certain that if someone sent a random letter to Microsoft offering advice on the design of their Xbox console, it wouldn't even make it to their engineers, much less actually get a response from anyone within the department.
Maybe if the brand hooked into it as a marketing effort they might publish a response all over their socials, but you'd certainly not a private reply.