When a company grows, a slide deck has to be used by more than one person. It is often hard for the pioneer presenter to let go of the old slides that she has been using for years. “What is wrong with this slide? When I put it up I tell this, this this, and this, these are really important points.”
Most of the above points do not appear on the slide though. The new presenters do not make them, the email recipients of the deck do not read them. The slide is merely a mental placeholder for the expert presenter to tell her story.
Time to let go.