We are (I hope) helping solve this problem at Kraken. We sponsor development of the iced library, which we're using to build https://cryptowat.ch/desktop. It's supported on Windows, Mac, and Linux and has received a ton of positive feedback about how fast and light it is. I have hope for the future, and don't expect Electron to stay dominant forever. Native GUI apps are slowly coming back.

https://github.com/hecrj/iced