Sometime the eagerness to bring change can be VERY unmotivated.
The button that said "Save and continue editing" in the editor was a great, obvious feature.
I can't think of any imaginable reason to remove it, except that who removed it probably didn't use it. He maybe had a so fast connection he could get in and out of the editor at the speed of light.
It is absurd to write without saving now and then, or to save only when one has finished and can walk out of the page. Especially if you don't use the horrid wysywyg thing, like me.
Please WP people, do consider give us back this feature. At least as an option in the settings "walk out of the page after saving" or something.