your chances of that happening are slimmer then someone replacing your computer with an Atari 2600 and you not noticingOK... sure, AMD fixed these hacks. But - what if someone breaks into your PC and replaces the motherboard with a compromised motherboard! This would be persistent across reboots!
And they refrained from making any judgement calls either way as to the validity of the claims or not:CTS-Labs released the information in an unusual fashion. Typically, semiconductor vendors are given 90 days to respond to vulnerabilities before they're disclosed to the public, but CTS-Labs provided AMD with only a 24-hour notice.
(emphasis added)The unusual nature of the disclosure, and the lack of any supporting evidence, makes it difficult to asses the impact (be it real or imagined) of the alleged AMD security flaws. It is noteworthy that the three different groups of researchers that discovered the Spectre/Meltdown vulnerabilities provided the industry with 200 days of notice to prepare mitigations, which was unraveled by The Register.