I've noticed a massive trend with sites making their navigation menus persistent (always visible when the user scrolls), and am considering doing it on a site I'm working on (it may likely have fairly long articles).
I was pretty sold on doing persistent nav, but when I went to double check on here, I saw a few answers that advised against it (namely, the answers on Fixed-position header and menu on a web page -- is that okay? and When do you apply a persistent navigation - is there a minimum page length? ).
Why are such a massive amount of websites doing it now? Has anything changed to make this good UX, or are designers just following a trend?