You may want to turn off the Startup Boost and the Continue running background extensions and apps when Microsoft Edge is closed as well.
Startup boost keeps the browser running in the background with minimal processes, so Microsoft Edge will start more quickly when launched.
Anything you can do to cut down really unnecessary CPU usage is a good thing.
You will note that 11 has a number of these tweaks you will need to get familar with.
Killing off the widget bar in 11 was number one on my list...don't need it don't want it.