I am from the last century as well . "Pro-formance"that is a new word. Usually "pro" means professional or "for work" which is not associated with the performance of the computer. I can accept reliability and longevity but not as discussed here CPU/GPU computing power.But I am "so last century"...!
And Pro means high Pro-formance computing... ;^p
Exactly where is the cutoff in performance between an Pro device and a consumer device? Excepts for the extreme points, I cannot say.
Whatever processors that goes into the MBP16 can also go into the 24 inch iMac as the latter can actually utilise a high performance processor far better due to less thermal and no power restraints. This would be a prosumer device. "Prosumer" - the tech industry feeble effort to hold on to a meaningless classification system.
Say instead:
High performance : CAD/3D modelling/8-16k video editing, ML
Medium performance: photo al other video editing, software development
Low performance: office, using web apps