> Not sure what the point is on the first two - you wouldn't even need that with a non crap ui framework.

Server-side rendering is a business need not a programming need. A company like Spotify may want to change the UI without updating the installation. To do this on the web platform is a well-supported pattern. To do this with Qt you'd have to implement your own HTML- or JSX-like framework on top of Qt (like Hyperview does for mobile).

Companies that use Electron can just move faster and crush competition. That's why there are billion dollar companies based on Electron programs and Qt people get excited about it being the software behind the radio volume button on the latest model fishing boat.