I didnt know Intel had one of these, who is to say it isnt present in AMD as well ? or ARM? but that is further down the rabbit hole than my education allows me to go.
I worry about everything when it comes to this sort of thing, but even Im with wagex on this one... not particularly worried. The only way to ensure complete safety from this sort of thing is to build your own CPU

Disclosure from Intel is another matter however. From the article they seem to be pleading that no one will try to crack it if no one knows about it... well someone found it I guess. Which is why I should be able to know about it, in order to calculate my own risk when making CPU decisions