@mattl .... and, similarly, existing users and contributors are (demonstrably) finding the existing UX adequate, and so maintainers do not perceive a need for research that might lead to major changes
It takes time and there is usually something more urgent to do
Given that nearly no FLOSS projects do it, if you decide to spend the time necessary to do it right (and produce something that seems simple/obvious, as well-made things often do), critics will misunderstand and deride your effort