What is the major disadvantage of using a locking ascender type of hauling system?

The major disadvantage of using a locking ascender type of hauling system is that it can be slower and more cumbersome compared to other systems, as each ascender needs to be manually adjusted or repositioned during the haul. Additionally, if not used correctly, there is a risk of the ascender slipping or failing, potentially leading to safety hazards. This type of system also requires more technical skill and experience to operate effectively, which may not be suitable for all users.