While this quote is directed at my suggestion and not holiday items in particular, I think it pretty clearly states the devs’ feelings on limited time festivities and, by extension, limited time items.
That is, it seems that these special items are probably only available within the holiday timeframe. Of course, Mac doesn’t explicitly state anything about items themselves, so he could just be referring to the special events and minigames while allowing items to be obtained outside the given period. I can’t say anything with 100% certainty at this point.