Linda Yaccarino
CNBC's Julia Boorstin and X CEO Linda Yaccarino
  • X CEO Linda Yaccarino appeared rattled during her most high-profile appearance to date.
  • Yoel Roth, former head of Twitter's trust and safety department, was added to the schedule at the last minute.
  • Some criticized tech journalist Kara Swisher and Code for "sandbagging" Yaccarino. 

Late Wednesday afternoon, I was standing near the swimming pool at this year's Code Conference and saw Julia Boorstin, CNBC's Senior Media & Tech Correspondent, walking by looking visibly upset as she was about to conduct one of the biggest and most challenging interviews of the year.