I think it would have to do far more with the green board and not the antennas. Especially at the home owner router level your not going to put the effort into

I think it would have to do far more with the green board and not the antennas. Especially at the home owner router level your not going to put the effort into the back plain of the router. And while most of them aren't really general purpose computers in that, a good part of the functionality is going to be baked into the various chip hardwares on the board. One might be able upgrade the OS but changing the functionality of the radios probably totals the box. Plus, what would they sell you next year? To be sustainable, the company would have to be mostly a software company that people are willing to pay license or upgrade fees for increased functionality or performance. There may be a niche for that, but most people won't upgrade their router or CPE for free. At scale, I doubt that would pan out, especially with increased, upfront hardware cost.