Tongue-in-cheek, but my Moccamaster which I bought second-hand is still doing great after 15 years. Two deep cleaning sessions in all that time and just running it with vinegar a couple of times a year seems to be all it needs.

The device is dead simple. No advanced electronics. Nothing complex that can break. Just a coffee maker fine-tuned to near perfection.

The only flaw it has is the handle for the pot. I've resorted to replacing the plastic handle with a fancy walnut one I made myself. I needed that because we tilt the pot sideways to fill the reservoir with water (because of the placement on the kitchen counter and the cabinets above), and that plastic handle is not designed for sideways stresses.

You shouldn’t fill the reservoir with the coffee pot, unless you’re really washing the pot super clean after each use. Better get a proper jug for filling the reservoir, so you’re not putting coffee residue and oils back into the clean-water system.