Small correction: 2. The licensing makes it very expensive for non-open-source applications that are unable to comply with the restrictions of the LGPLv3.

As stated _many_ times: Qt can be used via LGPLv3 in commercial software. Only a few components like QtQuick3d are GPLv3 only.

Having used both QT and Electron, my subjective experience is that Electron is just more ergonomic to use. And it's not because I'm new to C++ either. I have more years logged writing C++ than I do in the JS ecosystem. It's also not because I actually like Electron very much (I have several big problems with it), but if I needed to build a new cross-platform UI app these days Electron would be my default.