that is the issue that i have figured out with the dependence upon so many plugin ins/add-ons.
if the developer is not timely in updating you either have to remove it and do without or stay on an older version of xenforo.
the site i am staff on is currently facing that as several of the add ons used there are still not updated 3 months after the official release and 7 months after the first beta.
my site suffered from one of the add ons i use and the developer disappearing.
it is a two edged sword and currently it is cutting badly for xenforo in my view.
that is a very telling scenario for anyone that looks at it.
Seven months from initial beta release and 3 months after the official release (a 1/4 of the year) and you are still waiting on updates from a third party developer before you can upgrade?
to me that shows the very weakness on the dependency of add ons for a site.