The lack of traction is mostly because Rust game development, with exception of Bevy efforts, it is still pretty much on the dark ages of everything is code.

The industry has moved beyond that, with teams where programmers only have a minor role (quite important nontheless), on the whole game design, with plenty of tooling for designers and other non-programmer folks to do their tasks.

Eventually with more graphical tooling, or scripting systems, it will start to gain more steam.

Note that TinyGlade also created most of their tooling in-house, they only partially depend on Bevy.