He did say that in a recent interview but he also said this at PAX East during the Reddit interview:

"R: Players enjoy keeping many glamour sets which they switch between frequently. Are there any plans on making a "glamour log" system where obtained pieces of gear are glamorable without having the physical item, like the WoW transmog log?

Y: *Yoshida thinks for a bit* When asked is it physically possible, it’s possible. It’s not impossible but there’s so many different things that we do want to in terms of UI that I’m afraid the priority isn’t as high on our list. Leading up to 4.0, we are setting up the UI so that each job has their own sort of user interface and there are many different tasks that are on our priority list so it might take a bit more time before we can address it."

I don't think he wants people farming old content for the sake of gearing. If they wanted no one going into old content for Glamour options they wouldn't have bothered to have a material needed to craft Coil gear only drop in the Binding Coils. Infact, regardless the only way to access older glamours is usually going back and doing the older content.

Again, the idea of a Glamour log is nothing new. What I made this thread for was, since Yoshi P has said it is technically possible, to help show interest for the feature to be worked on as one of FF14's next features.