With regards to why people aren't talking more about this, maybe fatalism is involved as it seems there is a certain inevitability that whoever controls the silicon also controls to some extent computers. There have been some interesting developments in people trying to create open hardware like lowRISC http://www.lowrisc.org/ and also using ARM so there is some hope in this area.
In short, the overlap between people who know about it and are also security conscious is pretty small. There's also dozens of other things people should be more concerned about in terms of a corporate or state actor gaining unauthorized access to your computer.
In case anyone wants a CPU + FPGA combination without this type of security risk, check out Zynq.
Intel ME on the other hand is baked into the hardware, and AFAIK can't be properly switched off, it appears the best you can do is set up a fake Intel MPS Server to point it to:
https://software.intel.com/en-us/forums/intel-business-clien...
- Introduced a long time ago; it's old news.
- It is talked about, but only in certain circles
- Confusion over the relationship between vPro, IME, and AMT, or at least unfamiliarity with those terms making articles/discussions related to them less likely to pop out as interesting topics.
- Some of the people who know about it consider it the normal, boring, status quo, and they react to anyone shocked by it as an alarmist.
[1]: http://hackaday.com/2016/01/22/the-trouble-with-intels-manag...