User blog comment:Kirkburn/Technical Update: October 1, 2013/@comment-452-20131003025422/@comment-126761-20131003153223

One of the primary reasons that we switched back from the wide table popout was because it did not work well with the incoming Darwin fluid width changes - it was a rather clunky solution, to be honest.

We do not disagree that both methods have their strengths and weaknesses, but we do feel allowing tables to scroll in-place is generally better and less reliant on 'special' interactions. (It also already works likes this on the mobile skin).

Regardless, I will pass your feedback along to the team for them to read over.