I don't even care about the memory footprint personally. I can buy more RAM. It's that every Electron app makes up all of it's own navigation paradigms, doesn't integrate well into the OS, and always feels slow.
In the 00s and early 10s, the Linux desktop was criticized because of the inconsistency in the look and feel, e.g. using Firefox (GTK) in KDE (Qt) plus random apps in Motif, TK, or straight up Swing. The consistency of Windows and OS X desktops was desired and looked for: people migrated themes across toolkits, synchronized font settings, etc.
Now every Electron app does their own thing and people don't seem to care one bit, but when I need to use one of them I feel like I'm using a different CSS-enhanced, antialias-enabled 90s Winamp skin for each app.