imo slides are much more effective if you're a good presenter AND you are recording your presentation. But most people are not good presenters, and so their sl

imo slides are much more effective if you're a good presenter AND you are recording your presentation. But most people are not good presenters, and so their slides are either a wall of text OR they're an absence of text that make the slides impossible to parse without a recording of the speaker. So it's not necessarily that writing is the BEST format, it's just not the worse when it comes to the lowest common denominator. The other upside that the post fails to notice is that it forces everyone to get used to writing, which will lead to better documentation overall.