I have one of those 7 year old MFPs and it has worked great, but HP has kindly sent me a new replacement printer because of a cartridge issue I've had in the last few months. The new printer is three "generations" newer, looks great, has a few new features, but has significant operating flaws like paper jams and crashing my brand new (2 week old) laptop and a year old desktop.
Already spent three hours on the phone with HP tech support with the new printer, after five plus hours on the phone with the old printer, and really learning how much they need to either be retrained (or trained to begin with, why do I have to explain what duplex means) or re-shore them to North America. Already been escalated, now waiting for a local case manager to call back. But I know that means sending me a new printer, instead of trying to fix this unit, because they don't do tech support here.