Everyone is writing Electron and PWAs at this point. Nobody wants to train C++ developers for a minor speed boost consumers don't seem to care about. They have a full build pipeline and dozens of trained webdev engineers ready to go, why invest in a whole new product?
A LOT of people have looked at the cost/benefit of electron VS something like QT. Many have decided that the performance hit isn't worth the cost of developing the C++ build pipeline and training developers on how to build QT apps:
- Spotify
- Visual Studio Code
- Atom
- Invision
- Slack
- Mattermost
- etc.
The web tooling is actually pretty nice if you stay in your lanes. CSS / HTML / Javascript can create a really nice experience if you don't do a bunch of dumb stuff and make pragmatic decisions.