I actually use a scrolling document for most of my talks at work. I do this for a few reasons:

I am lazy. I just want write in Markdown. I have a dynamic HTML renderer so I don't even have to render the document myself. https://github.com/superjamie/emdee

Usually the stuff I write is intended to be consumed either as written or as video. I don't want a bunch of slides with incomplete talking points.

It works for me.