I've been playing since launch and I'm just now noticing that you can order tools and seasonal items straight from your catalog...
How long has this option been there?!
And what else don't I know??
Mind=blown. I remember trying to get different color balloons for a carnival section I was making, when I could have just ordered them this whole time...
I'm pretty sure that, before the update, seasonal items didn't appear in the catalog, period, whether you ever had them in your possession or not. I only today noticed unorderable items in the catalog with the tag "seasonal" next to them. So I'm pretty sure that's new, and there are probably other changes to the catalog, too.
I think it's like that in every game as well, so it's not even a new feature.
edit: upon further research I think the original Animal Crossing is the only other game in which you can order tools from the catalog. makes sense that I was aware of this bc that's the one I've spent the most time playing out of all the AC games.