[sam0x17]

You also get full control over the local file system with electron. There are plenty of system utilities... stuff like etcher.io, disk partitioners, backup software, custom FUSE-based file systems, etc., that you couldn't do purely in a web browser for security reasons, but that can benefit from the portability and sexiness of an electron-based UI (performance concerns aside).

I actually doubt there is anyone who thinks of electron in this way, in that they only use it because X feature isn't in the browser _yet_. Many electron apps could only be done natively, again for security reasons. Things like the slack desktop app don't meet that criteria, however.