You (XiXiDu) don't seem to think that intelligent machines are likely to be that big a deal. The switch to an engineered world is likely to be the biggest transformation of the planet since around the evolution of sex - or the last genetic takeover. It probably won't crash civilisation - or kill all humans - but it's going to be an enormous change, and the deatils of how it goes down could make a big difference to everyone. I do sometimes wonder whether you get that.