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As I mentioned earlier, if you want other devices supported, you're going to need to step up to do the work. It's not a one time thing but rather a massive amount of ongoing work to keep them properly tested / maintained. Need to port lots of device-specific work and fix issues.
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The project is only going to officially support devices with very strong security properties as that section mentions. No point of asking if a few arbitrary devices out of many thousands of them will be officially supported. You can quite safely assume the answer will just be no.