Answer:
The lunch destination of choice for teenagers and hospital employees.
This is a shape and a symbol that we literally cannot live without. What is it?
I'm a green veggie that looks like a tiny tree.
An utensil used for bread. Also a paper cutter. Used by a thug to take a life, Or wielded by the tamest wife, When used to spread the butter.
I call the trees my home, yet I never go inside, and if I ever fall off the tree I will be surely be dead.
What is always coming but never arrives?