On a basic technical level, it would be not difficult at all. IMO the challenge would be in getting enough critical mass to make the manufacturing cost effectiv

On a basic technical level, it would be not difficult at all. IMO the challenge would be in getting enough critical mass to make the manufacturing cost effective, and getting enough people to reasonably believe there would be future support for it, therefore making it an attractive consideration for purchase. So the issue is not the technology so much as the distribution and marketing of it.