Should this air-filter should have been replaced sooner?

Thanks for the reminder. Changed oil in the wife's truck today. I decided to check the air filter after remembering this thread.

Wouldn't ya know it, had a mouse nest in there to. Not nearly as bad as yours though. I checked her filter every other oil change for the first 100k. Never never was dirty. Changed it at 100k just cuz, and maybe looked at it twice since then. Has 160k on it now. Guess I shouldn't be so lazy....