> If I can't buy it and get a damn manual and programming tools to twiddle all the bits, I'm not adopting.

Hence the isolated device security hardware should be an open standard with FRAND licensing. If devices ship with a prepaid commercial license for 10 years of device security updates from BIG_CO, the default commercial baseline would be raised independent of IoT vendors. Tech-savvy users could then have the option to replace the device security layer with the OSS _or_ competing commercial stack of their choice.