The whole package is 166.4 MB for Linux (PyQt5 is 117.9 MB ). This is even much bigger than Electron's base bundle size. This matters much for Linux devs who want put everything into a single package (e.g. AppImage) to avoid dependency problems in each Linux distros. I hope Qt would divide Pyside 2 into components (for example, QML) so that devs can easily optimize their package size.