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I've always appreciated the "main" link in the MSO header, just as I appreciate the "meta" link in the SO header, as I frequently go back and forth between the two.
I just wanted to confirm that there are currently no plans to bring a "main" link back and no alternative in the current design to the tedious "click, search the drop down, navigate to the MSO link, click again" process that's now in place to navigate back. (That's four physical/mental operations vs. one).
Along the same line, should I expect the "meta" link to go away from SO when it migrates to the new design?
Update: See in particular this answer to the close-as-dup question reference.