Formula above has me on 166.8mm. I have been reading* about longer cranks increasing sheer forces on the knee, and advantages of opening up the hip angle w/shorter cranks.
I think there may also be some benefits w/above as it relates to aging.
Am putting 170's on my rides. Not a big diff from 172.5 on the rd bike but substantive coming from 175 on the mtn. bike.
*
https://bikedynamics.co.uk/FitGuidecranks.htm