That was the main idea behind Pyre-Qt, but dynamic media resizing is not well supported in Qt unless you pull in a web view (at which point you've recreated Electron).

https://pyre.chat

One fork of Pyre does this using a web view, and it fixes the media scaling bug, but what is the advantage over Signal Desktop at that point (besides being a tray icon & having native integration)?

Edit: Capitalization