[ogoffart]

Qt is still used, but I think part of the reason it is less used is that C++ isn't always the right language anymore for building GUI application.

That’s actually why we're working on Slint (https://slint.dev): It's a cross-platform native UI toolkit where the UI layer is decoupled from the application language, so you can use Rust, JavaScript, Python, etc. for the logic depending on what fits the project better.

[72deluxe]

How can C++ not be the "right" language? It seems to meet all the requirements for event-driven GUIs - event handlers are function callbacks after all...

[ogoffart]

C++ works, but compared to other languages it's often no longer the most productive choice for UI work. Modern UI code is mostly glue and state management, where fast iteration matters more than squeezing out maximum performance. And when performance does matter, there are also newer, safer languages.

For teams comfortable with C++ or with existing C++ libraries to integrate, it can of course still be a strong choice, just not the preferred one for most current teams.