Shared libraries

> I kind of think we are all doomed in the long run (e.g. imagine all of GTK and Qt are written in rust and require a complete world rebuild for every tiny update). IMO that is not scalable and the trend to move to Rust or another langue like that, will bounce at some point.

GTK has language-independent object descriptions (GObject). I don't see why that couldn't be provided from a Rust core as well. Qt relies more on C++ magic and would be harder translation, but a QML interface could be provided from a Rust core.

Also, I feel that Rust implementations would have more, smaller crates to provide "all" of these UI libraries/frameworks than we have today, so you might actually "win" if something can depend on a smaller footprint in the first place.