but i'm not that old
i'm just 19,
no matter what you say ,
shall sound wack (opposing social standards, old, stupid, not cool, old fashioned)
We've abandoned "shall" in our everyday speech, however it is still very much used in formal speech and documents...legal writing is full of it.
In Australia, "shall" is still common but only in short questions of the following kind:
Shall we?(implying: do you/we want to eat?)
I'm eager to rip the cover off the new gizmo to test it out.
Isn't it used the same way by Americans?
You'll hear it on occasion in some expressions (a good example would be "shall we go", "shall I" etc.), but it does sound rather formal to us.