What will happen to dated items and dated material ?

[Akujin]

Leave them, why not. Let it be a remnant of a time before the change to ARR. People (myself included) always like to have ruins and such from times long ago to visit, dated gear can be just like that, pieces of an age past, but not forgotten.

And for that matter - if they wanted people to steer away from dated gear of any sort to go towards new gear, since they did adjust the receipes and stats so people would want to pursue new gear, rather than the dated. Zero out the stats on the 'dated' gear, render them completely useless outside of sentimental value. Besides, converting them to materia is only dependent upon the item type and its level, not what stats the item itself has, right? (if I'm wrong on that, correct me and I will accept that.)