I don’t get the idea of saying one thing while the audience reads something else. It seems like a sure recipe for confusion.

I usually put almost no prose-type text on my presentations. Figures, captions for figures, equations, variable definitions, small code snippets, those are ok.

The only time I’d put prose on there is if it is a “main idea,” then I’ll do the thing where I read it word-for-word from the slide. But that’s got to be used sparingly enough that it sticks out as a weird moment that the audience is supposed to remember.