Or does it, on the contrary, still serve some unique and vital purpose?

Both are necessary components for an artwork to function, each serving unique purposes.

Beyond this each building was built at different times to serve unique purposes for the campus.

There are two additional fountains, which serve a unique purpose.

The game sports four weapons with their own unique purposes, abilities and effects on the environment.

However, he planned you as a unique person for a unique purpose.

Each of the wings serves a unique purpose in the school.

The place has over 15 courtyards, with each having its unique purpose.

The shuttle's unique purpose is to carry men to the space station.

Each path then heads in a different direction and ends with a unique purpose.