I don't think this necessarily has to hold true (Discord for instance have implemented their apps really well), but in reality this holds true for most electron apps in my experience.
Unfortunately, there aren't many native applications any more. At this point I'd prefer a Windows application that works in Wine over yet another "cross-platform" Electron webbrowser-with-builtin-website.
No they haven't. The discord electron app is a trash fire. I use discord in Safari. It's just as bad UI and UX and slowness as the electron crap, but at least I get a few more hours of battery life...
Since I removed the electron garbage from my phone, my battery life tripled from one day at most to three days...