The true downside would possibly simply be that, though the content is identical, individuals read dev articles proactively, while going to web sites like mdn particularly to look issues up as they need them, so even just copying the same information right into a platform like dev may assist by bringing it to people's attention. Other than that, dev just seems to lack a solid idea for selling creativity and experience above repetitive content, so when folks do write a brief post about some cool factor they're doing, it normally simply disappears within the sea of listicles and beginner tutorials. I doubt a 26 years old that has not been grown up in a toxic atmosphere would immediately begin to submit copy-pasted stuff and insulting folks