Selected answers from the Dumb SEO Questions G+ community.
Wissam Dandan: 1- no
Amp works on any page /post /any custom post type
Alan Bleiweiss: Yeah you can create an entire site solely in AMP if you wanted to. I don`t recommend that, yet it is possible.
Jennifer Denney: I feel like this a good topic. I think that google doesn`t necessarily favor one or the other. But from an SEO perspective it`s more about how you do internal linking and make sure people find the next logical piece of content in the buying cycle. It`s a tough call sometimes on whether something should be a blog post or another page. I don`t think all pages need to be on the navigation (I`m open to debate on this one) but they definitely need to clearly be linked to one another. I feel like this gets missed a lot and blog post get buried. You can`t expect someone to scour through your blog post to find the answer to their questions. This is what I think google wants too. At least my results show this to be true.
Alan Bleiweiss: And social sharing plugins focus mostly on blog posts because that is how the ecosystem of the web evolved. Blog posts became the primary method of conveying ongoing information expression, so it would then be natural to share them on social networks.
Alan Bleiweiss: As for pages vs. blog posts, as a separate value concept, it is generally best to not use blog posts for content that remains true into the future to any lengthy period unless an entire site is just a blog.
Such content is better suited as pages because they have "evergreen" (ongoing) value whereas blog post become buried and end up deeper in the site.
A strong, well designed knowledge section or knowledge pages within primary navigation silos is best for that evergreen concept also because it`s where it makes the most sense to "answer all the questions" during the full buyer or student Life cycle journey.
They shouldn`t have to scroll through endless "previous posts" links or guess what to search for in an on-site search box for those needs.
It doesn`t mean anyone should "link to all the pages" in main navigation. Instead, each section with extensive evergreen depth needs it`s own section level sub navigation functionality.
Neil Cheesman: Disregarding the social sharing aspect - Does this not also depend on the permalink structure and site hierarchy? I have had pages/posts/categories/tags rank - they can all have similar (or possibly identical(urls) and certainly the same content - although slightly different html/code etc.
Stockbridge Truslow: I`m not so sure that blog posts are preferred - that`s just where the "minty fresh" stuff tends to come from. Fresh content ranks a bit differently from established content. All the math hasn`t yet been done to see how the page is really going to rank over the long term, so Google gives it some assumed values during that period. (A new "page" gets the same types of assumptions - but blogs are where the new stuff usually comes from).
Blog posts have a few other advantages that pages often do not (especially with the SEO industry`s penchant for making all pages be at the top level in respects to the URL). Not only do blogs tend to have URLs that reflect some sort of important context - be it category or date or whatever - but all the index pages (tags, categories, etc) on which the post appears on gives it context as to how it relates to the other pages on the site. In the days of Rankbrain - context is king. Structure your normal page URLs to match your site structure like a blog tends to do and this advantage passes along to pages, too.
And finally - there IS also a bit of difference (in Wordpress, anyway) between the coding on blog posts over pages. Blog posts have meta information for date published, date updated, author, etc that isn`t included on pages - by default, anyway). There is also (on a well done theme) some extra structured datainformation on blog posts like the categories, tags, etc. The search engines get a lot more starting clues upon discovery on a typical site`s blog than it does a normal page.
So yeah - blog posts have some advantages to help it rank better right out of the gate. Is it always going to rank better? Probably not - once all the math has been run and the page can be properly ranked. Can the same thing be done so pages will rank - absolutely, it`s just that most folks don`t do it. Out of the box, Wordpress (and other CMS systems) does structure pages and blog posts differently. And if you have products on your site, you want to install WooCommerce or something similar even if you aren`t selling them online because they are structured yet another way.