Dynymoor
I think it relates directly to how it is used and cared for.
I have a Creatures of Leisure 10' coil that I use on my 12'6" for ocean paddling, it has never been hammered. 2 years.
10' balin I use on my 9'6" All Wave and my 9'1" longboard used regularly and is five years old.
8' Balin use on my 8' gun 8 years old and no signs of wear.

I wash them thoroughly in fresh water after each use and make sure they are dry before they go in my surf box.
Never have wrapped them around my fins. I believe this is a big no no.

I reckon if you buy good quality and look after it they should last a few years at least.

Cheers. ET.

i just got 2 Balin Storm riders with 10mm performance cord. Very cool. I had previous broken a FCS and a Da Kine leg ropes.
They have the look of quality and hopefully they will last

I snapped 3 in two weeks at the start of the year... Shapers, creatures and balin...
On the bright side I quit the durries after the second one....

"A good tip when you still have most of the leg rope attached to your leg is to tie the loose end around your paddle just below the handle and just tow it behind you as you swim in using both arms. "

I wish I had thought of this!

My one handed swimming resembled someone drowning and scared the crap out of the wife who was standing on the beach watching my board get smashed all over the place.

Cheers