I find it's similar with my Xtreme 25, but usually its #2 section that goes every 2 years due to wear inside and out . #1 goes about every three years, probably due to only wearing on the outside. Section #3 gives way about every four to five years due to much lighter use, and to date I've not had to replace sections #4&5 as they get used even less frequently than section #3.
I try to anticipate when each section is about ready to go and buy the necessary part in advance.
I've had the 25' for over 4 years and still looks new. Only use it a handful of times a month and even less since I bought the 22'. Its my 18' that takes all the beating so that's why I have two of them. One breaks then I order the part if I don't have it and run with the other one. Going to buy a new 25' and add the 4 sections I have to make a 47' pole and then that's me complete. Two 18', 22', 25' 35' and a 47' and when I retire I will sell them. 😉
Red 50% jets are out of stock!