Multi-Threading in Zemax:

I am aware that Tolerancing operations and some Optimization benefit from Multi-Threading in Zemax 

Q1)  Which operations or functions benefit the MOST from additional CPU Cores & Threads ?

It is difficult to predict how effective additional $$$ spent on multi-threading CPU will impact Zemax.  My most recent milestones with high end work-stations are :  

In 2017   a workstation with ~ 6 cores & 12 threads was fairly typical

In 2018+ a  workstation with ~ 36 cores & 72 threads was considered a fast work horse 

Obviously there is a balance to be established between the number of cores & threads, as well at the speed of the CPU itself, and turbo options. 

Q2)   Here in 2023 what configurations of Cores / Threads / CPU speeds are people working with while running ZEMAX ?  Results ?