Well, that's probably true, but my only source for that is what people wrote on the internet. OTOH, I know e.g. the NSA has basically infinite resources.

Anecdotally, I've heard that there are ways to destructively image complete chips, and not just the layout but also the internal charge state. I believe the technique used femtosecond lasers. Of course that is also hearsay and I can't validate it.

My point is, as an interested layman, I don't know enough to trust this technology with my life - but it would be exactly useful if my life depended on keeping my secrets. So that contradiction kind of reduces its value for me.

I'm sure people with the required knowledge can properly evaluate these products, and for those people they are probably immensely useful.