

Yeah… I mean, I did hedge by saying “depends on your CPU and your risk profile”, but I understand your point and will edit my comment to caution readers before playing with foot finding firearms.
From my understanding it’s a mixed bag. Some of those vulnerabilities were little more than theoretical exploits from within high levels of trust, like this one. Important if you’re doing a PaaS/IaaS workload like AWS, GCP etc and you need to keep unknown workloads safe, and your hypervisor safe from unknown workloads.
Others were super scary direct access to in-memory processes type vulnerabilities. On Linux you can disable certain mitigations while not disabling others, so in theory you could find your way to better performance at a near zero threat increase, but yes, better safe than sorry.
There’s definitely some physical manifestations of your strongest emotions. Strong feelings of fear or anger trigger musclular reactions in your belly, strong feelings of anxiety or tension in your neck, love and contentment in your chest, etc.
Perhaps they were trying to find those physical connections to gauge the emotion or intensity?