I've been pondering Intel's chips for a while now. It was what made me decide against making a Bitcoin wallet service. Since my decision a slew of services inferior to what I had failed for various reasons. Can't say what would've happened, if I had proceeded.

Is there any evidence for or against the Intel chip exploits? (Other than "They could do it, and why wouldn't they?")

Is there any reason to expect AMD to be any better?

What about (certain?) ARM chips?
What about MediaTek?