It's crazy how much RAM electron needs, at my old startup the main product was an electron app, i initially used to run into this issue where AI wouldn't clean up the dev builds it spunned up for e2e testing and each could be over 500MB, it just get's to a point that the cross platform advantage is no longer worth it, i think it was one of the main reasons cursor had to move off electron to rust based builds.
It is a full browser, not surprising at all, only for those that never coded native applications.
Oh if you don't like large build artifacts Tauri might not be something to get excited about.