Depends on how you ride and where you ride as well as the quality of the parts and the wheelbuilder's skill and a bit of luck. Basically, how long is a piece of string is easier to measure than wheel durability.
Almost all of my wheels are handbuilt and I can't remember breaking a spoke or any loosening off or even anything going out of true that I hadn't crashed.
Depends on how you ride and where you ride as well as the quality of the parts and the wheelbuilder's skill and a bit of luck. Basically, how long is a piece of string is easier to measure than wheel durability.
Almost all of my wheels are handbuilt and I can't remember breaking a spoke or any loosening off or even anything going out of true that I hadn't crashed.