I just returned from a 3-night trip with my wife where some old gear failed.

I use a Sawyer mini as a water filter and was using an old Platypus 1-liter bag (2003 vintage) as the dirty water bag to squeeze the water through the filter. On day 2 it sprang a serious leak in a seam where duct tape was useless. Luckily the leak was located where I could pinch it shut with my fingers, if I pinched hard enough. We got by.

Just minutes before it failed I remember looking at it, thinking about how old it was and wondering how long it would last.