I think Vue 3 is better than Svelte 5's runes, but unfortunately, in my 7 years of using Vue, I've realized that Vue is just a follower of React and may never catch up, as it is only trying to optimize the status quo rather than break the deadlock.
Vue 3.6, for example, is incorporating a new signals rebuild that's several times faster and probably the fastest signals implementation out there[0]
Vue Vapor will also release in experimental mode in 3.6 and once it's mainstreamed, will probably also be among the fastest render models.
Both changes do not affect the DX and require no migrations, but will provide faster performance for ever more complex apps.
Basically, if I understand correctly, it's not "shiny" enough -- even though it is going to significantly improve signals performance.