The Discord developers are working on this. It's not just web components but also native dependencies as well, so it's understandable I think if the Linux version comes in a little bit behind macOS and Windows versions where the majority of the gamer market is.
Next up, I'm starting to like when companies use desktop HTML5 apps. HTML and JavaScript does enable developers to move quickly with their interfaces, and I find them to be generally much more well-kept than native counterparts, where there's more inertia in making interface changes. A good comparison gamers will be familiar with is Steam. The Steam UI is written in a valve-proprietary, CSS-like language that I imagine is less performant than CSS. It's also REALLY buggy, so much so that I'm surprised that Valve has not already moved to an Electron app for Steam. If they did they'd be able to iterate quickly on interface improvements which they certainly don't do now.