Overall US election history you are right. In recent times it come to be viewed as a springboard to run for the presidency.
Given the two most recent examples Pence & Harris it now may be reverting back to the norm.
Given the two most recent examples Pence & Harris it now may be reverting back to the norm.
Biden and Bush 41 are notable exceptions.
Pence & Harris are typical folks you'll expect in a VP.
The POTUS does not like it if his VP is too ambitious.