blogdown + hugo + github + netlify is an amazing system. The main problem I've experience is that the easy-to-include within-page comment system disqus is not nearly as functional or easy to read as sites based on discourse.org such as the RStudio community site. I have taken to including a URL to our own discourse.org site datamethods.org instead. I wish there was a way to have an inline view to discourse.org type of sites from within a blogdown article.
Mainly the formatting and the lack of features such as those in discourse.org related to searching for comments, timeline, seeing the flow of comments.