It is sad actually. They should turn it off and replace it with an LED bulb.
The awful truth is that EVERY incandescent bulb can last basically forever. But lasting forever is not a good thing in this case. Imagine if you have a choice of a bright LED bulb that uses 10 watts, or a very dim old incandescent bulb that puts out 1/40th as much light yet uses 50 watts. Which is better? You would need 40 of these old bulbs to put out as much light, and it would take 2000 watts instead of 10 watts. Do the math.
Now the secret: Want an incandescent bulb to last for the next 100 years? Here’s what you do: Install a 100 Watt incandescent bulb designed for 110V in your ceiling, and run a line from a transformer supplying 50V DC (notice how dim the photo of the old Edison bulb is). Never turn it off, keep it running 24/7. That’s it, simple. It won’t be efficient, but it will put out a little light and run for a century or more. And you’ll pay thousands of dollars more in electricity over the next century than if you had bought an LED bulb instead.