Because the people who are qualified and skilled enough to make one from scratch are working for companies like Qualcomm, 55 hours a week at a salary like $190k.
It's kind of like asking where there aren't any gpl licensed m.2 ssd flash controllers, the people who design them are getting paid nicely to design and sell a commercial product. It would be cool if there were such a thing, but there is only so much "free" expertise to go around...
It's kind of like asking where there aren't any gpl licensed m.2 ssd flash controllers, the people who design them are getting paid nicely to design and sell a commercial product. It would be cool if there were such a thing, but there is only so much "free" expertise to go around...