> Java, i have NEVER seen a function that consumes explicitely an Object
So you did not see any Java code from before version 5 (in 2004) then, because the language did not have generics for the first several years it was popular. And of course many were stuck working with older versions of the language (or variants like mobile Java) without generics for many years after that.
Exactly, I have never seen such codes [*].
Probably because the adoption of the generics has been absolutely massive in the last 20 years. And I expect the same thing to eventually happen with Typescript and [typed] Python.
[*]: nor have I seen EJB1 or even EJB2. Spring just stormed them, in the last 20 years.