Yew has had about 10 commits in the past 6 months and the original creator has since moved on.
Leptos is a good solution for web-app type stuff, but IMO there's a big usability gap. I'll let the community be the judge there, but I wrote up some differences here: https://github.com/dioxusLabs/dioxus/?tab=readme-ov-file#dio... Leptos was fortunate enough to receive a lot of attention from youtubers on its launch.
The most important thing here: we raised venture money for Dioxus. We have many years of runway, are pretty lean, and exclusively focused on pouring resources into making the best GUI library for Rust (and potentially branching out to Python/JS). Getting into YC isn't easy, raising money isn't easy, and there's currently no other Rust projects with similar goals, talent, and financial backing. Biased of course.
Oh, and we're committed to the bevy integration. bevy_dioxus is already updated for 0.5 and we share corporate sponsors with the bevy folks.
Final point, legally, no we're not inspired by any pokemon with a similar sounding name. Even though that pokemon is awesome.