For over a year i was running 5+ Slacks in the Electron app, and continuously noticed how much memory was being hogged up. After some basic research, I realized that Electron is basically a wrapper of a Chrome instance. Suddenly i understood where my ram was disappearing to because so many "native" apps running in Electron were literally just spawning new chrome instances and gobbling up ram.
I now do my best to keep my website apps running just in Firefox containers.
Electron feels like the last rush of "write once, deploy everywhere" days of flash and Adobe air. God save us all.