I see some are down voting you, but that is an option. If the CPU has a design error then you can return it in many countries. If there is a firmware fix and that fix does not affect performance to a significant degree then it's probably OK.
Products should do what the marketing says they should do.
Products should do what the marketing says they should do.
...which is, that they were never designed to be side-channel-resistant. As early as the 80286 Intel was saying protected mode is not a real security boundary, only a mechanism to avoid accidental errors instead of deliberate maliciousness.
Products should do what the marketing says they should do.