Earlier quoted context omitted.
If you don't mind me asking, how much RAM did you have before, and what did you upgrade to? I recently got a new PC myself and decided to go for 16GB, my previous one (about a decade old) had 8GB and I didn't feel I really hit the limit, but wanted to be future proof. Because as you said, a lot of 'modern' applications are taking up a lot of memory.
I also went from 8GB to 16GB recently (virtual machines are hungry); but I had gotten rid of Slack even before that. I mean, yes, it has round edges and goes ping and has all those cutesy animations - but 2GB of RAM for a glorified IRC client, excuse me, what exactly is it doing with billions of bytes worth of memory? ("Don't know, don't care" seems to be its developers' mantra)
For each of your Electron apps there is a little compiler chugging away.