I am running Emacs on macOS, and it only takes 43 MB barebones, and my regular setup takes about 81 MB. Both opening the same org-mode file. Point being that it really depends on what you choose to run on Emacs, and it does not have to be about 100 MB.
Just to add to that, I don't think anyone should be concerned about their text editor taking 200 MB anymore. I doubt it is worth worrying about.