Earlier quoted context omitted.
It's bloat caused by stuff like Electron, and people choosing to write desktop apps in HTML + JavaScript/TypeScript + some framework. If people even used a framework like Qt (a really mature and well-maintained desktop framework the favored framework of KDE Plasma, etc.), their memory usage would be so much lower. (I'm not counting the memory used by Qt's shared .so / dynamic library files.)
and people choosing to write desktop apps in HTML + JavaScript/TypeScript + some framework. While the "web everything" trend is definitely responsible for a lot of the bloat, it is upon closer inspection not the whole story. For example, I remember various "AJAX chat" clients were quite popular around the turn of the century, worked in a browser like IE5 on a system with probably 64-128MB of RAM and a single core Pen…
I still use it though, and the graphical client running on my system (which is also an RSS reader) uses 23 MB of RAM at the moment, displaying 1375 messages.