This is a bit of a microcosm of Rust OSS libs in general; the libraries that get the most PR, articles, popularity are often not the best ones. I see this in the rust embedded and GPGPU areas as well, for example.

The smell for me is if the library is designed based on a plan, or attempting to be X ecosystem in Rust instead of built around one or more practical piece of software, and evolving to meet the needs of these softwares.

With that in mind: I adore EGUI. I hadn't heared of GPGUI before, but because of its origin as being purpose built for the Zed editor, this immediately gives it credibility, and I'm excited about it!