How often do anglers change line?
Personally, I use lighter lines and as such these lines don't last as long. Esp with UV, and wear and tear from constant casting or retrieving.
My lines under PE 2 would be changed from anything from a season (i.e. 3 months or so) up to about a year if I do not use the particular line much...
Some of my heavier lines have been in service for longer than 2 years esp if usage has been pretty minimal. But at first sight of line deterioration or damage, out it goes and I'd just go load some new line on.
Anyone else would like to share as well?