Earlier quoted context omitted.
The strong point of Electron is easy _cross-platform_ application development and packaging (spits out .exe, .app and Linux binary), with no further dependencies. Ever tried packaging a QT application for Mac, Windows and Linux? I can tell you it's a painful experience, one I don't want to repeat. Also HTML+CSS allows for extremely versatile styling and fine-grained control of appearance.
A weak point, though, is JavaScript — quite possibly the worst popular computer language in history. I honestly think I'd rather starve than write another line of JavaScript again. Even reading JavaScript diffs from other guys on my team is a horrible, terrible experience. It's just a sad, awful, miserable, verbose, broken language. As a compilation target from a better language, I suppose it's mostly acceptable. But…
My current main work laptop (a pre-TouchBar generation MBP) can only barely run a "heavy" JS-application like Slack and something like IntelliJ at the same time.
Migrating Slack into an IRC client reduces the CPU & memory footprint of _sending, receiving and displaying text_ by over 90%.
Something went seriously wrong somewhere and we're only going deeper into the hole.