Yes, we're using Vue 3 and composition-style components over at https://radiopaper.com. My only gripe is that Vue's standard templates can't be typed as thoroughly as JSX can (IME - after mixed experiences with Vetur/VTI[1]), but we've been gradually migrating everything to TSX via render functions[2] and finding it perfectly capable. Added bonus is an ease of composition of template code – small local-use components can easily be split out within the same file for readability, in contrast with Vue SFC's. Vue even has true "function components" now! [3] (nice to have in really minimal cases)
I love Vue 3, but 99% of the reason I love it is the SFCs and not using JSX/TSX most of the time. Vue can't optimize render functions as well as it can optimize templates, and templates are significantly more approachable for people like me who come from the design/HTML/CSS world and want to contribute to the codebase (especially since most front-end devs coming from JS world suck at HMTL/CSS).
Is typing really the main issue there? Working in render functions and TSX is sooooo much more clunky for doing the same basic things, and you lose all the nice benefits of Vue's SFCs and things like built-in class array logic.
[1] https://vuejs.github.io/vetur/guide/vti.html [2] https://vuejs.org/guide/extras/render-function.html [3] https://vuejs.org/guide/extras/render-function.html#function...