SSL/TLS is a huge bloated protocol, and most vulnerabilities aren't in the ciphers themselves. These vulnerabilities are often in other parts of the implementation.
I'm at a loss as to what I think about this idea. I first read it thinking "not another single board computer, we have loads of them already." If it used
RISC-V it may be worthwhile, but otherwise I hear the licensing for ARM isn't the most accessible to the budding startup.
A better idea would be to provide building blocks (ethernet/wifi/Bluetooth/USB/etc) as separate modules, this way an application that doesn't need WiFi or Bluetooth don't have to have it, they save power and money, and have fewer security issues.