I do not have any Technic kits. I'm not even a LEGO user. However I am interested to know the following:
In a typical Technic kit, how many of the parts are standard Technic pieces and how many parts are unique to a given kit at the time of its release?
P.S. I am not sure whether Technic "pieces" are still called "bricks".
In response to comments
It appears there is no general rule for this, therefore I will ask about a specific kit, namely 42100:
Building the Largest LEGO Technic Excavator! - Liebherr R 9800 https://youtu.be/KPHkrSZ7SSk
The kit is built live (speeded up) on the video so I believe the parts will be visible and identifiable to an expert.
I don't want a precise mathematical description, just an approximate proportion or count that can identified in this kit.