I would guess that Scamp
is following the thought that if something ain't broke you don't fix it.
But I always thought that those twisted things were UGLY!
You have led the way in improving the looks.
I wonder if commercial wooden spindles wouldn't work also.
After a short look, bingo:
Turns out they are called Newels or Balusters.
A charter member of the Buffalo Plaid Brigade!
Whether you think you can or think you can't, you're right.