I have three of those decade+ old 2040 printers and I refuse to throw them out despite my partner insisting I’m “hoarding.” I love them.
I think the duplexer may be jammed, but since it’s so infrequently used, I can’t be bothered to look up how to fix it. Other than that, I wish it had AirPrint as it would decrease the friction of printing from iPhones and iPads. When (if?) it breaks I’ll replace it with the updated model.