Are you using QT 1.0? I don't think any (updated) desktop GUI from 30 years ago has stayed backwards compatible. So yes frameworks like QT are from 30 years ago

Are you using QT 1.0? I don't think any (updated) desktop GUI from 30 years ago has stayed backwards compatible. So yes frameworks like QT are from 30 years ago but they are entirely different from what they used to be back then. Except for maybe some winforms stuff?