I use capitalised pronouns because I like them. That's what the article explains. The reasons that people like their preferred pronouns don't tend to go any deeper than that.
Maybe a story will feel more complete: 4 years ago, while My goddess-mother was helping Me understand My gender, She suggested I try out capitalised pronouns. I did, and I liked them. As good as she/her felt compared to using he/him, that's how They/Them felt compared to she/her. I liked them, so I kept them.
I use Voyager, but I have it set to compact view.
In My opinion, the best design is usually one that gives users a choice in the design.