Laptop confiscations are rare, only people which are suspected, or have past history of either smuggling sensitive data, or carrying child pornography of anything similar have they laptops confiscated.
I haven't heard about TSA confiscating laptops, but I have heard about Customs taking laptops. The two organizations are not the same; TSA is often run by private companies under license by DHS. Also TSA a shit, people sleep on the job, steal shit, sell stuff; all sorts of abuse. CBP is far stricter about conduct.
I can tell you never had your computer confiscated, because we already know about those tricks. Or you didn't come in at my POE.
If you're going some place boring and safe, say like most places in Europe, and you're a boring person, you'll probably won't be bothered.