Developing apps with Qt and QML is super easy these days. I wrote a post about my experience[1]. QML is such a joy to program the UI in, and then you can use a compiled language–C++/Rust/etc for amazing performance gains. Also, most Qt Quick components (those exposed via QML) are written in C++, so using these native components means that even working with these abstractions is very performant.

[1] https://rubymamistvalove.com/block-editor