Remains true today. Certainly no paper consisting only of a thought experiment could get published in a top journal. Many self-described physicists have told me that thought experiments have zero scientific value. Brian Greene who wrote The Elegant Universe says he thinks Einstein's original papers would've been round-filed if submitted today. (And they weren't just thought experiments.) I suspect we know about Einstein today only because of the open-mindedness of Max Planck, who was Einstein's original reviewer.