Right now Reflex is meant for full-stack apps, but portability is something people have asked us for.
We're working on making Reflex work in different environments like Jupyter notebooks, and we're also exploring using Reflex for widgets [1] that can be embedded in pre-existing apps, so you can add interactive Python elements easily without rewriting your whole app.
Has anyone compared Solara and Reflex and can comment on pros/cons? Are there other options in this space? Maybe https://shiny.posit.co/py/ ?