Why Would They Eliminate App Exit Using Back Arrow Button on WP 8.1?

[JessHerr]

Before, if I wanted an app to stay in the app switcher I simply pressed the windows button and if I wanted to close it I pressed the back arrow button. But now I don't fully close the app until I go to the app switcher and close it (I waste time doing that). So the back arrow and the windows buttons have basically the same function now. For me it's annoying when I want to "quickly" change to another app in the app changer and realize there are still some apps I thought I closed. And that was one of the reasons I hated Android and loved WP