> Sad to see that the C++ community is sleeping on this. There are no modern GUI components or toolkits, specially under such a permissive license.

I'm not sure what you are talking about (there are plenty of x-platform C++ GUI toolkits with components). Maybe you mean "accelerated toolkits"?

Qt is modern enough, still there are hardly any Rust libraries as feature rich in capabilities and designer related tooling.

It is also the KDE infrastructure, used in plenty of infotaiment, factory dashboards and medical devices.

Azul.rs is making lots of progress now and it'll have decent C / C++ / Python bindings (so it won't be Rust-only). But I guess for now GPUI is more mature.