That means ES CPUs have a problem with newer versions of Lightroom Classic. No matter what I do, my imports are stuck with huge stalls and low CPU usage. My workstation imports photos blazing fast Lightroom 8.x, acceptable speed with lightroom 10.x and complete sluggishness with 12 and higher.I always upgrade to the latest version immediately.
I am pretty sure this is a hardware issue, as problem does not go away with clean OS. Same Lightroom version imports also works extremely fast with a standard i7 raptor lake.