different time periods
Please point to modern processors or SoC available to consumers that does not have these subprocessors. Selling "new" 13 year old processors is fine, but that won't last forever and technology needs change.
Again, you are spouting emotional, uninformed garbage. There is no technical definition of attack surface that would classify commingled processing as better than bifurcated processing.
I honestly believe that you are being paid to post this stuff to sabotage real beneficial collaboration.