Well, I think there is no hard limit for this. I think that diagrams, tables and such are just tools for the author to better convey his message. If the author

Well, I think there is no hard limit for this. I think that diagrams, tables and such are just tools for the author to better convey his message. If the author is skilled enough to put all the content into some form other than paragraphs then it's all good. I would, personally, rather have read the whole sentences and paragraphs, but that's just me and I can appreciate well written (created?) infographic, too. As I hinted above the problem is that the more novel the form is, the more skill it requires from author to be understood when using this form. Paragraphs are boring, old school and thus easy to produce in such a way that the readers will know what to do with them. On the other hand creating a diagram or concept/mind map that will be immediately readable is much harder.