Coolant Hose Life Expectancy

[Nanniepoo]

Car is '08 N62 188.5k miles

Just curious if others have experience with what I consider shorter than ideal/expected coolant hose life. Two have failed this summer; #7 end of May and #5 was maybe leaking for a while, but confirmed yesterday. This is annoying to me as I replaced nearly all hoses in 2018.

I replaced #7 January 2018 due to failure. Back then it was a slow leak and was arguably still drivable. This time it blew right after shutting the car off after our very first time towing (empty enclosed 10' cargo trailer) and was spraying coolant everywhere.

#5 was replaced June 2018 as "while I'm there" work when I did the water pump. I replaced a number of other hoses at the same time, again because I was there/preventative. I haven't pulled it off yet but it appears it's leaking from the molded section where the hoses connect to make the 'Y'. It maybe started as a slow leak for who knows how long but is now a steady drip/nearly a stream.

I did the valley pan and coolant transfer pipe work summer 2024. So there's a chance I damaged #5 when removing/reinstalling, but everything passed the pressure test after that work and I only added a tiny splash of coolant in March so seems it lasted 10 months or so even if damaged.

The point of my post is effectively all hoses are 7 years old now. Forced regular coolant changes due to relatively frequent need for coolant work (WP, aux WP/heater valves, coolant pipe). But hoses are failing 7-10 years, genuine BMW or after market. Is this expected? Should I just do another round of replacing hoses?