It was bound to happen at some point. I bought my WTCPN station in 1983. I has been on my bench and used almost every workday since then, with nothing but tip replacements (and very few at that). A couple years ago I bought a TC201 replacement heater in anticipation of the original one failing. It finally happened on Wednesday. Station powered up and no heat. Heater pins measured open. With great pleasure, I replaced it.
37 years. I think this qualifies as amazing service life.