> Saying “they’re both c++” is seems kind of misleading and meaningless right?

Not really, if you avoid writing Javascript code in your QML components, than most of your executable will end up being compiled C++ code. If you do write Javascript code in your QML components, than it *could also* be compiled to C++ code using the QML script compiler[1[2].

> QML apps that heavily implement core logic in javascript would be slow as balls.

The entire point is to separate logic and view where logic is written in C++ and QML simply represents the view (which almost end up being built upon simple primitives that *are* C++ objects). So if you keep this separation you get amazing performance with great simplicity and velocity.

[1] https://doc.qt.io/qt-6/qtqml-qtquick-compiler-tech.html

[2] https://doc.qt.io/qt-6/qtqml-qml-script-compiler.html