Originally Posted by Starter
^^Okay and this is where the science part of it that I don't understand is perhaps coming into play... Most streaming devices at this point are compatible with some sort of keyboard, be it bluetooth or RF... Both technologies that in this day and age are cheap and easy to implement, regardless of how Harmony pitches them as some massive upgrade. So if those various proprietary and 3rd party keyboards work, there must be some codes, right? So why can't a universal remote manufacturer implement them?
To answer your full original question, there is not a scientific (or technological) reason for no QWERTY remote. Can it be done, or made? Yes, as mdavej stated Logitech manufactured one has a keyboard with a universal remote. Perhaps this is not exactly what you're hoping for in a device, but it does exist.
So, the reason is not scientific, but economic. I understand your point about the L.A. market, but you are only looking at your friends. What about the whole of LA? As a step towards the "economic" reasoning, in this day and age, an "Activity" based universal remote, as the Harmony remotes are, should be almost a "must" have for the average consumer. Yet, Harmony remotes are truly a "niche" market. I cite my daughter and son-in-law as the "average" consumers. They built out a basement into a family/entertainment room. They spent tons of money on a large Samsung 3D TV, added a "Bose Cinemate" system (I refrain from comment on this one!), the XBox One, full Comcast X1, etc. But.....they still use two to three remotes to control it all. Of course I am puzzled, but this is what they do. They do not see the reason to spend hundreds on a remote control. Again, it may not make sense, but the consumer market never has to make sense.
So, Starter, turning this question around on you, why do the streaming device manufacturers only provide a "numeric" remote with their devices, and not a keyboard one? And why are the "streaming apps" On Screen Menus set up for direction and select commands only? If consumers demand something, the supply will be there.
Those consumers that really want a QWERTY set up will make one, as you stated there is connection capability readily available. But until ALL devices require it, it is simply not cost effective. Further, it has to be fully turnkey, or "plug and play" for the full consumer maket.
So, there is no scientific reason for the of no qwerty remotes, only economic reasoning.