A bit of an odd question, but does Habbo have a feature or anything that makes you feel old? For me I think it's the Market Place - the Market Place went live before the merge and the merge was now 5/6 years ago, it shows how long I've been playing! The other one for me is WIRED, I can't imagine Habbo without it now, but I remember when it was untradeable and I still have it on my old account because I've never bothered trading it over what about you?
There's probably more I've forgotten about, but I'll probably add on later.