Well, Teams is using less memory than Skype for Business that I also have running and compared to Visual Studio and multiple browsers windows I have open they are hardly using anything.
Edit: Yes, I think Electron/nodejs are "bloated" too if I look in node_modules - but once I stopped worrying about that I got over the whole "bloated" perception.
You've never experienced Skype for Business, it's awfully slow when doing simple things (resizing the window, opening a new conversation, sending a message, etc.)
Edit: Yes, I think Electron/nodejs are "bloated" too if I look in node_modules - but once I stopped worrying about that I got over the whole "bloated" perception.