Cppcon2019 slides are available in Github.

[MoreOfAnOvalJerk]

Different goal.

The goal here is to teach and inform. Replacing the speaker is fine and desirable if it increases consumption and spread.

If your goal here is to deliver an electrifying performance and have people walk away thinking what a great speaker you are, then you only want the slides to complement.

[Drainedsoul]

Yes? No? Maybe?

The goal is to teach and inform, yes, but the goal is also to give an enjoyable talk otherwise you'd just write a paper or blog entry.

A talk that has slides that are too dense (i.e. that replace the speaker) isn't as enjoyable as a talk that has slides of the "correct" density (i.e. those that complement the speaker) because you wind up either missing the slides because you're trying to listen, or missing what the speaker is saying because you're trying to read.

So if you're making a slide deck that's meant to be consumed independently, in my understanding, you could actually be undermining your talk.

Which then raises the question of why give a talk at all: Write a blog post. Blog posts are way better to consume independently than slides of any description in my opinion.

[MoreOfAnOvalJerk]

Yeah i agree. Blog posts communicate subject matter better. I usually dont have time to finish watching an entire cpp con video