Electron (sadly imo) is being used in plenty of newly developed cross platform applications, a lot having users that have no clue what hackernews is.
Sample problem (left pane blurry, right pane sharp - view at 1:1 scale on ~100dpi screen to notice it easiest, but it's quite visible to me with scaling even): https://i.imgur.com/Ju0UK2K.png
You act like this is a problem exclusive to Electron apps. People have been doing shit like that forever.
Make the window too small and the buttons overlap in the titlebar. I didn't even pick an extremely small size or anything, this was about half my screen width on my Macbook. But this is the kind of thing that making a proper native app forces you to think about, but that making an Electron app often doesn't.
http://i.imgur.com/MOaESLC.png
I can pretty much tell within a minute of starting an Electron app because things just don't feel right no matter what the app is. Sibling mememachine is also pretty accurate - Discord is very oversized like many other Electron apps.
Not using native platform widgets is also incredibly noticable. Every time you're not using native platform buttons or menus it's so easy to tell, it feels weirdly slow, has excessive gaudy animations, the spacing is wrong, text size is wrong, etc. That's not to say that it can't be done right just that you're on an existing platform and that consistency is key.
Qt is great but electron has certainly been getting better and better.
I have a 4 year old mac and VS Code goes from closed to a file opened in about 4 seconds. Still a stupid amount of time for a text editor, but no-where near 30.