If people think that Stu, Lake or anyone at the webinar is going...

If people think that Stu, Lake or anyone at the webinar is going to tell about the exit of the CEO then I think you will be disappointed. Just imagine your own life if you quit your job, what would you say if your ex employer started publicly explaining why you had left? What I expect is Stu will express thanks to Steve for the great job he did express regret that they will no longer have him aboard for the next part of the journey, and then he will say that he's here to discuss the companies bright future looking forward to new CEO, demo plant commissioning etc, etc.
In short, he will say something nice, draw a line and move on.