Its true, that a browser engine has a higher resource usage initially - it can easily hog 50-100MB without any content being loaded, but seriously, thats not much of a concern anymore these days. On the other hand it provides a great programming environment for web devs with many bells and whistles (which arguably might not even be needed for certain electron apps).
What concerns me more is what web devs actually do within that environment - it's almost like many devs have lost a basic sense of resource management, like memory comes for free, gets garbage collected anyway, so why should I care.
Many electron apps are overly shiny in appearance, backed by tons of graphics and animations, but in fact are lousy managed under the hood. I am not quite sure if this is a direct effect of using a GC language, or if Javascript+HTML in particular makes it too easy to get quite far without some comprehension of inner works of the browser and the machine underneath.
This is also a pain with modern webpages - I really dont get it, why a browser with 8 tabs opened can easily grow to several GBs after a while.
There are a few counter examples - electron apps that do heavy lifting while still being nice to your RAM and CPU. Sadly thats exceptional, not the common case. I tend to blame sloppy web devs here.