Generally agreed on all points, they're pens that feel good to write with and have little aesthetic joys to them that make writing more enjoyable. I like unscrewing the top of a pen. It's a little spark of joy. But it's mostly aesthetic and is likely fairly subjective.

> It's actually less work and strain with a ballpoint NOT to join all your letters together.

This to me is the biggest observable, practical difference that comes out of the capillary system of the pen. Anecdotally, my handwriting improved quite a bit when I started using a fountain pen.