How long do bibs/shorts last?

Equipment
15

My good ones, like Assos or Santini, lasted 3-4 years in a temperate climate. Now I’m living in a hot humid climate. Lucky to get 2-3 years now but I also cycle through about 3 different bibs at any one period of time. I ride about 15,000 - 20,000 kms a year, weigh 70 kg, wash in a wash bag after every ride, and air dry afterwards away from direct sunlight. For me most often the lycra stays ok, though it can get a little thin, but mostly it’s the chamois that loses it’s supportive padding.